I’ve been having a lot of interesting fun playing with the many maps on the National Library of Scotland site. NLS give access to some historic high-resolution zoomable images of over 91,000 maps of Scotland and beyond.
Initially I was using it to superimpose the old OS 1:10K 1900 map on to the modern satellite image of the plot of a long demolished ancestors house in Fife (see the hatched building in the image on this page). By using the slider, that changes the opacity, I was able to see exactly where the house had been in relation to the ground today. All that remains are the stables and the farm buildings that make up part of the modern farm and no sign from the air of the villa that once stood on the plot.
It is not just maps of Scotland that can be found on this brilliant website as I was able to select an English county and chose between different series of the Ordnance Survey and the modern hybrid view from the air for a village in Leicestershire that I was interested in not to mention the coverage for London.
The better family historians will always try to gather together as much information on their ancestors as possible so as to be able to place their forebears squarely into the contemporary environment in which they lived.
The bare genealogical facts of names, dates and places go only so far to build a family tree, whereas finding out about the social and physical landscapes of your past family’s lives can help you to understand the challenges that faced them.
Landscapes can and did change over time. The enclosure of land and the movement from rural employment to working in the cities, as the industrial process grew had an affect on past generations. The building of the railways and roads, which may have disrupted their lives as well as provided new communication routes for them to travel down can often be seen by looking at various map series over time.
For those of you researching your English/Welsh family history and have hit a brick wall, maps are covered in more detail in a module of the Family History Researcher Academy.
Learn more about English and Welsh family history resources which can be used to find your elusive ancestors with the Family History Researcher Course,
A contact asked me about occupations recently and so I found them this really helpful article by professional genealogist Rosamunde Bott. I am sharing it here for everyone to read.
English Occupations: Finding More About Your Ancestor
By Rosamunde Bott
Whilst rooting around in your family history, you will learn what your ancestors did for a living – at least as far back to the early 1800s. This is often one of the most fascinating aspects of discovering who your ancestors were. Whether they were a lowly agricultural labourer, or a highly respected surgeon or magistrate, the curious and wide range of English occupations can lead you to further knowledge of how they lived their lives on a day to day basis. For some people it can be exciting to discover that a creative gene, such as writing or painting has made its way down to the present.
Much of this information can be found on the census, at least back to 1841, and sometimes beyond depending on the availability of records. Some earlier parish records did mention a man’s occupation, and other records, such as directories, wills, property deeds and tax records can also give occupational details.
Many of you will have come across occupations that are now obsolete, and will often need further explanation. What, for example, is a night soil man? Or a calenderer? Or a fag ender?
The first of these might have been found in any large town or city, emptying dry toilets in the days before plumbing. Not a job I would like to imagine any of my ancestors doing – but fascinating nonetheless.
The other two are connected to the textile industry, and will usually be found in those industrial areas where cotton was being produced – for example, Manchester. A calenderer was just a generic term for a textile industry worker. A fag ender was someone employed to trim off loose bits of cloth known as fags.
If you trawl through the census records for specific areas, you will of course find a wealth of occupations connected to that area’s industry. Sticking with Manchester for the moment, you will find many jobs associated with the cotton industry, and among the weavers, winders, packers and piecers you might also come across Fustian cutters (cloth workers who trim corded cloth), beamers (people who handle materials before weaving), billiers, billy roller operations or billymen (all terms for cotton spinners) or even an impleachers (cloth weavers).
When you find that an ancestor’s origins are in a particular area, it is worth while finding out about the major industries there, because this will no doubt have had some effect on your ancestor’s life, even if he (or she) was not directly involved in it.
For example, shoemakers are known everywhere – but a shoemaker working in Manchester would probably have had a different experience to a shoemaker who worked in a more rural area, or on the coast. Is he making shoes for factory workers, agricultural labourers, fishermen or for the well-to-do?
If your ancestor moved around, it was very likely it was to find work. Undertaking a bit of historical research on the local industries can give you a good indication of why your ancestor moved from one town to another. My own great-great grandfather started out as a bricklayer in Newcastle-under-Lyme, and moved to Birmingham where he became a builder and employer. You only need to find out about the building boom going on in Birmingham in the mid-19th century to work out why he made the choice to move!
Some occupations can lead you to finding further documentation. For example, workers in skilled trades may well have started out as an apprentice, and you may find the apprenticeship records at the local record office. These can give you further details about his origins and parentage.
If your ancestor worked for a big company, it may be worth finding out whether there are staff records in existence. If the company still exists, they may even keep their own set of archives.
Not only are occupations interesting in themselves – they can lead you to find out further information, whether it is more family records, or information about how your ancestor lived, and under what conditions. Much information about trades and occupations can be found on the internet, and there are many books about various trades and industries. The Society of Genealogists publishes a range of books entitled “My Ancestor was….”
Old English occupations are varied and wide-ranging, and they can tell you much about your ancestor. Make sure you always follow up this line of enquiry and find out as much as possible about what he (or she) did for a living.
Ros is a professional genealogist and runs a UK ancestry tracing service for UK and international researchers who need help with their UK ancestry. Ros offers a one-stop-shop tracing service for all UK ancestors, or record look-ups in Warwickshire and Birmingham. Find out more at Tracing Your Ancestors
I have to say that when I read this month’s Who Do You Think You Are? Magazine that I was a bit taken aback with the review of the four major sites.
Ancestry.co.uk, Findmypast.co.uk, GenesReunited.co.uk and TheGenealogist.co.uk are tested by a panel for the magazine.
I am a regular user of three of the websites as there are times when data can be found on one that is not on the others. Also, when searching for a person who has been illegibly recorded in the original records, and so posing a headache for the transcribers, one site may better identify your ancestor than on the others.
Sometimes Ancestry’s interface can be a bit overwhelming, as I have found in showing new users how to find their ancestors using this platform. Drilling down with the Card Index helps greatly.
I was very surprised, however, that Findmypast got such a high rating in the magazine review, after all the problems it has had this year with its new interface. I completely understand that there are good reasons for the new platform, which enables them to continue to expand the records available. Yet we have all seen the reports of disgruntled customers who feel the customer service was not what they had expected when they voiced their concerns. So why wasn’t this reflected in the article? FMP actually comes out highly for Navigation and search in the piece.
As a blogger I continue to post news about FMP’s data set releases on my site, along with those of the other providers, only to then receive emails and comments from FMP users expressing their frustration with the site. And I am completely independent of FMP!
Returning to the review article, I was also disappointed to see several wrong statements made about The Genealogist website which I feel I have to mention in the cause of fairness.
Firstly, it has been possible for as long as I can remember to simply use the “?” icon on this website to report an error and yet the reviewer states bluntly that it “wasn’t possible to flag up transcription errors”. On the contrary!
I also can not agree with the reviewers, who indicate that this website “promises more than it delivers” and that it is “possible to form an inflated impression of the content contained based on the marketing”.
An example given by one reviewer is the number of newspapers and magazines on the site. The article erroneously makes out that the data is less than it really is. I have found that TheGenealogist site has a lot more than just the two newspapers that their reviewer was able to find. I make it 15!
One of the contributors reported that, when searching, you couldn’t group all the census years together and she says that you have to examine them year by year. Again this is just plain wrong as all you need to do is use the Master Search which will allow you to do this!
I have always enjoyed reading Who Do You Think You Are? Magazine, but this article perplexes me in its bias. What is going on here?
I was back in the area of Jersey where I grew up today.
It was not my family history that I was researching, but ancestors belonging to someone else.
I had received a request to take a photograph of the house in which my contact’s forebears had lived and so I went to my computer and opened TheGenealogist.co.uk and looked up the head of the household in their Channel Island records.
This site has some “Jersey Almanacs” which are very useful trade directories for the islands and soon I was on the trail.
The Genealogist also has the full run of census data and images, which I next used to quickly find the person in question.
Unless you are new, to family history research, then you will be aware that the census collections are also available on Ancestry and Findmypast as well. I tend to use all three sites, as sometimes the transcription on one may help me better locate a person with a difficult name spelling.
In the 1901 and 1911 census it was quite plain that the family in question lived around the harbour at St Aubin, in the parish of St Brelade. The census in each case clearly gave the name of the house, though it was different in 1911 from 1901 so there was the possibility that the family had moved a very short distance. Either that or they had changed the name of their house.
So a simple task, you may think. All I had to do was pop along to the road in question and snap a building. Even if the house name was no longer visible, or had changed, there was bound to be a property in the road that had retained its name and I could use as a reference point. All I would need to do is count down the houses from that one.
Oh that it was so easy! You see the harbour front has some alleyways off it and these had different road names today from the ones used in the census. It seems to me that the parish has gone back to using the older French names for these roads from the Anglicised ones used in 1901 and 1911.
Another problem was that off these alleys were some semi-detached cottages, some of which are reached via foot paths. Also there were a set of steps, leading up to the steep Market Hill that rises behind the harbour, on which three more un-named cottages perched.
Both of the census records ignored the Methodist Church, that sat in the middle of the harbour frontage between one of my reference properties, as is to be expected if it had no residents to be counted. But it was also obvious that, in times past, some of the other buildings would have been warehousing, or other uninhabited commercial buildings and so these too were not enumerated. This made my task of counting down the houses to the ones for which I was searching, difficult.
I consulted the “Description of the Enumeration District” as in some cases this can give you a good idea of the enumerator’s walk. In this case it mentioned the names of the roads, in general, but did not explain how he had dealt with buildings set behind each other or to the side.
By finding some more reference buildings, that is those that have retained their names through to today, I was able to tie down the house in the 1901 to being on one plot. I am not certain that it is the actual building as it may well have been built later, it not having many of the period features of its neighbours to give away its age.
So only a partial victory for family history research this week, but the Description of the Enumeration District can be a useful tool elsewhere and browsing through a road on the census can often be illuminating in other ways. Sometimes you may find more members of the family living close by and a child missing from one house in its grandparent’s or Aunt and Uncles. I remember finding this in my own family in Plymouth.
Disclosure: Compensated affiliate links used above when discusssing the resources of:
Press Release from Findmypast that those of us with RFC/RAF servicemen in the family may be interested in.
Findmypast.co.uk, in partnership with The National Archives has released close to 450,000 service records of men of the Royal Flying Corps and Royal Air Force including 342,000 Airmen’s records never seen online before. Tales of derring-do brought to life so vividly by W.E. Johns in his Biggles series are well-known, but today’s release tells, for the first time, the stories of the unsung heroes from across the world and from the lower ranks that made up the RAF on its inception.
The majority of records in this collection date from 1912 with the formation of the Royal Flying Corps (RFC) and include men who continued to serve in the RAF up until 1939. The earliest records date from 1899 with the Royal Engineers Balloon Service in the Boer War. With these fascinating records now available online, Findmypast offers the most comprehensive collection of British military service records in the early twentieth century.
Drawn from across the world…
The records reveal for the first time how World War One brought together men from across the world to serve alongside each other. Over 58 nationalities served in the RAF during World War One, with men signing up from as far afield as India, Brazil, Japan, Russia, Poland, Mexico, Romania and Germany. Included in the records is the first Indian to fly into combat, Hardutt Singh Malik, who became the only Indian aviator to survive the war, despite coming under significant attack and ending up with bullet wounds to his legs that required several months’ treatment in hospital. After the war, Malik joined the Indian Civil Service, serving as the Indian ambassador to France, and following his retirement became India’s finest golf player, even with two German bullets still embedded in his leg.
… and from across society
Despite the RAF’s reputation as the perfect playground for the upper classes, today’s records reveal how those from the working-class flew wing tip to wing tip with the officers, and became highly celebrated for their superior flying ability. One well-regarded flying ace, Arthur Ernest Newland, had humble origins as one of at least nine children from Enfield, north London, but the records show how he went on to twice receive the Distinguished Flying Medal for his prowess in the air, ending the war having destroyed 19 enemy aircraft, 17 of those single-handedly. One of ten children from a poor family in Limerick, John Cowell also became a celebrated airman during the war. Beginning on 5 May 1917, and extending through 28 July, Cowell scored fifteen victories as a gunner, and was awarded the Distinguished Conduct Medal on 11 June 1918, as well as the Military Medal with Bar. Returning as a pilot in 20 Squadron he scored his final victory a year and a day after his fifteenth but sadly was shot down and killed the next day by balloon buster Friedrich Ritter von Röth of Jasta 16.
The air’s a stage
With the records containing information about an individual’s peacetime occupation, as well as their military prowess, it’s perhaps no surprise that the RAF appealed to the more dramatic members of society with records showing 104 actors, nine comedians and even one music hall artiste made up the RAF ranks.
“It’s a real treat to have such an extensive set of records about the everyday airmen of World War One” said Paul Nixon, military expert at Findmypast.co.uk. “These people, drawn from all walks of life, and from all over the world, played an incredibly important part in shaping our history, particularly in the development of aerial warfare. To have many of these hitherto unseen records easily accessible online for the first time mean that now many people can discover the Biggles in their own family.”
William Spencer, author and principal military records specialist at The National Archives continued: “These records reveal the many nationalities of airmen that joined forces to fight in the First World War. Now these records are online, people can discover the history of their ancestors, with everything from their physical appearance right through to their conduct and the brave acts they carried out which helped to win the war.”
The records, comprising National Archives series AIR 76 (Officers’ service records) and AIR 79 (Airmen’s records) contain information about an individual’s peacetime and military career, as well as his physical description, religious denomination and family status. Next of kin are often mentioned and this too has been fully indexed and is easily searchable. These records form part of Findmypast’s 100in100 promise to deliver 100 record sets in 100 days. To learn more about the records, visit www.Findmypast.co.uk.
I was having a chat with a professional genealogist recently.
During the discussion I mentioned a particular brick wall that I had in my family tree.
“When was the last time you reviewed it?” he asked.
“Ah, I see what you mean!” I replied. “It is over six months since I sent it to the back burner and concentrated on other easier to find people.”
It is a lesson that even I forget to do and that is to periodically go back and see if, with new information you can now make some progress.
New record sets may have become available in the time since you last looked at your ancestor. It may be the release of yet more transcripts by Family History Societies, or those of the genealogical retailers that can now aid you. New parish records may have been uploaded to the likes of Ancestry, TheGenealogist or Findmypast.
Your ancestor may appear in one of the more diverse data sets that the subscription sites are releasing such as the Tithe Records on TheGenealogist, new occupational records on Ancestry, or The British in India records on Findmypast.
It is not just the case of reviewing the recently released documents on the subscription sites, that I am advocating. Take a look again at sets you may already have used. Perhaps, in the light of your experience and any new found knowledge that you have gained since last you looked, the answers may now be clear.
With my friend’s advice I set about looking again at a brick wall that I had in Devon.
In 1794 I have a John Thorn marrying a Sarah Branton in Plymouth in the parish of Charles on the 12th January. This John Thorn is not listed as being of the parish, yet his wife is.
They then move quickly to Dartmouth where their son, also called John is born with the child being baptised on the 28th September of the same year. In the marriage register, in Plymouth, John Thorn Senior was listed as a mariner and so it does not surprise me much that they pitch up along the coast at another port. But then what happens to them?
We are taught to always kill off our ancestors as good practice. In my case I had not found the death records for John Thorn Senior, nor of his wife Sarah. I had an inkling that they probably settled in Dartmouth, as the line remains there for another two to three generations, but I did not know if they stayed or not.
Since reviewing my notes on the searches I made, in the parish records at the Devon Heritage Centre in Exeter, I have now realized that I had indeed found a possible burial of a John Thorn in Dartmouth in January 1810, but had not entered it into my family tree.
The page from the parish of St Saviour’s, Dartmouth, had helpfully given me the information that this particular John Thorn was only 41 at his death This means he could be a candidate for the marriage in 1794, as he would have been 25 in that year.
When I last looked at the parish records, on the visit to the Devon Heritage Centre (previously the County Record Office), I had been disappointed not to have found the burial entry for his wife Sarah in the same parish and so I had put this line of enquiry aside.
But now, as I looked back at my notes, I see that I had also done a thorough job and looked at all the other churches in the town. I had found, among all the people buried in Dartmouth, and with the correct surname, one Sarah Thorn aged 50.
This Sarah Thorn is buried at the Parish church of St Clement’s, Townstall, Dartmouth on the 21st June 1818. At 50 she would have been born in 1768 and so she may well have been the wife of John, who was buried 8 years prior in the daughter church of St Saviour’s that is closer to the port.
Looking back at my visit to the record office I can recall that I finished my trawl of the parish record microfiche as a deadline for me to leave approached. I had a flight to catch from Exeter Airport and a connecting bus from outside of the Met Office to get me there. In my rush I had noted down the finding but had not looked at it in the right frame of mind. So perhaps here is another reason for reviewing your brick walls.
Now that the Devon Parish Records are on Findmypast I was recently able to go back and look at them at my leisure. This time without the pressure of missing a flight and so I can hypothesize that these two individuals are very possibly my direct ancestors.
Regretfully, with the paucity of information to identify someone contained in the pages of most parish records, I can not be completely sure. As with anyone with a common name there is always the possibility that they are simply namesakes.
If you would like to learn more about Death records, parish registers or good practice in doing English/Welsh family history then take a look at joining the Family History Researcher.
There is a special trial offer price of £1 for the first 2 weeks at the moment. Click the banner below.
I’ve been to the Midlands this week and while I was there I took the opportunity to do some research in the Dudley Archives & local history centre.
No matter what gets put online, and believe me I am a keen user of online content, when I get the chance I still love to go to an actual archive and do some research in the reading room of one or other of these local authority depositories.
I spent my time in the one run by Dudley Metropolitan Council looking back at parish records in Halesowen and was fascinated, as always, by the extras that are to be found written in the margin of the parish records, or as notes in the front or back.
One note that I saw this week referred to a number of burials on the page and it mentioned that all of the above died of smallpox putting some context onto the conditions at the time. In other records down at the Devon record office I have seen a whole brood of children being baptised together after the family had returned to England after many years in the fishing fields of Newfoundland and a helpful side note by the vicar explaining this.
Another great benefit of a visit to a record office is that they often have books on their shelves that can be helpful finding aids. I was able to make use this week of a set of indexes to the parish records, published many years ago, but with them I could narrow down the dates that I wanted to look at on the microfilm reader.
In my Family History Researcher Academy course on English/Welsh ancestors I have a module specifically about the treasures that can be found in a County/City Record Office. The course can be done at your own pace and comes in 52 weekly downloads that build into a great resource for busting those brick walls in family history.
In England and Wales the Record Office is where the records of the local government administrative area are kept. In many cases they also house the ecclesiastical diocese records and, from a family historian’s point of view, they are the keepers of the old Parish Registers collected from the churches of the area, which was my reason for visiting Dudley Archives this week.
A Record Office:
– collects and preserves historical records of all kinds relating to its county,
– makes these records available for research of all kinds by all interested individuals and groups, and
– encourages and promotes awareness of the value and importance of its documentary heritage.
Usually a Record Office will also preserve a great deal of other archival material such as the records from independent local organizations, churches and schools.
There may be papers donated by prominent people from the community, leading families, estates, companies, lawyers and more. If you are in the area where your ancestors lived then go on an pay them a visit. The staff are usually very knowledgeable about their records and the district and so they can be a huge help to the family historian.
Findmypast’s customers seem to be telling them that they want to go back to the past website.
It is difficult to ignore perhaps the biggest story in the British isles family history world this week of a customer backlash being played out on social media and on the review websites such as http://www.reviewcentre.com and http://www.trustpilot.co.uk about Findmypast.co.uk’s new website.
It even spilled over on to my Nosey Genealogist YouTube channelwhere an interview I did with Debra Chatfield at Who Do You Think You Are? Live got comments posted about, what Findmypast’s customers think of the new site.
While it may not be all of their subscribers, venting this anger, it would be fair to say that many of their customers are not impressed with the new site’s functionality and these are demanding a return to the old site.
Comments indicate that customers do not like the “new and improved platform”, some find it very slow to use and difficult to search for records. It would seem that these customers of DC Thompson Family History’s Findmypast do not like it, preferring the previous interface.
The facility to search for an address was not working properly this week, as I found out myself, though Findmypast promised to fix that.
It would seem, from the head of steam being built up, that many of the subscribers are threatening to walk away from Findmypast to other genealogical providers.
As someone who uses more than one website for my searches my immediate solution was to look up my census address query on the rival website ofTheGenealogist, which also offers an address search not to mention carries a very substantial suite of data sets including all the census records, parish records and the recently released and very interesting Tithe Apportionments that I find fascinating in my ancestor research.
I was also interested to see in an email that I received on Friday from the Society of Genealogists that they are running a training session for Members, staff and volunteers of the SoG.
They say that As the changes are quite significant the Society has arranged some special training in using the new style search functions etc. Paul Nixon, UK Data Strategy with DC Thompson Family History has agreed to come to the Society to make a training presentation and explain how it all works now.
I don’t really understand why Findmypast has let the situation get to this point.
As a fresher on a Business Studies course, way back in the 1980s, I remember being taught in the first few weeks of my undergraduate course that companies that are Customer led are the only ones that will survive. Those businesses that are product led or led by technology often try to push their customers to accept what they think is best for them, and that this is a recipe for disaster.
Surely a company such as DC Thompson Family History will have people within it that understand this customer focus? Lets hope so.
At Olympia I caught up with Dr Ian Galbraith from the National Wills project and asked him to give us a few tips about what people should do if they are searching for will records.
“Well the big problem with wills is you can not always tell where the will might have been proved.” he said.
“If you know your ancestors came from a certain place you’ve gotta fix on where their birth records might be, marriage records maybe where they died. With a will although in most cases you probably have an idea where it is. Wills did get proved all over the place, maybe very far fromÂ where you think.
“So when you’re trying to find a will you might go for the obvious places and find there’s nothing there. That doesn’t mean to say that there isn’t a will that’s been proved somewhere else. So it means that if you want to unlock the value of information which is in wills.
“I mean wills are one of the best single sources for the family historian.
“To find it you really need to have access to an index which covers the whole country not just individual counties and that’s what we’ve been trying to do and we’ve got coverage of virtually every county in England.
“Its not complete yet for every county but its the single biggest set of indexes for English probate records.
“That’s complimented also by an increasing collection of digitized images of wills. For example for Oxfordshire, Cheshire, York and a lot of abstracts of wills. Now abstracts make it a lot easier sometimes to find out what’s in a will because somebody else has done the hard work of reading it and transcribing it. They may not put all the text in there but there’s an awful lot of legalese and what they left to the church for candles and so on, masses to be said. But the salient stuff…what they left and to whom they left things that’s in the wills and they are enormously rich things.
“They give you a huge access to the families and the friends of the people who died because they will name them as beneficiaries; so a typical will will contain an average of ten names of other people besides the testator and probably at least half of these people will have different surnames
from the testator.
“So once you get into a will you can suddenly find you’ve got an awful lot more information than you started with. Other leads to follow up. It comes back to the issue of finding them in the first place.”
“Great!” I said, feeling that we had got an enormous amount of useful information from the interview. “And so your website is part of the origins.net?”
“Yes.” he replied. “Yes, Origins.net has been around now for oh, the best part of fifteen years but, erm, we started to concentrate on probate records about five years ago. We already had a reasonable collection but we realized that this is something that we really wanted to look at seriously, because it was one of the big problem areas.
“Births marriages and deaths, parish registers; yeah, there are lots of sites you can go and get really good collections of these. Census records, yeah. Now these are the primary places you’re going to look. You’re going to look at census, you’re going to look at Births, Marriages and Deaths. But where do you go next?
“And one of the major places, perhaps the most important single place to go next is wills; if you can find them.Â And bear in mind also even if your ancestor didn’t leave a will there’s a pretty high chance they’ll be mentioned in the will left by somebody else.
“So so don’t worry, oh my ancestors didn’t leave wills. Not true! All kinds of people left wills. They can be very poor and very rich. It is not just the rich who left wills. Some wills you wonder why. This guy’s got nothing but he’d still make a will and leave it to his relations or to his friends mentioned by name.
“So it really is well worth looking into wills.”
“Great; thank you very much. That is very useful.” I said. “Thank you.”
One of the modules in my popular course in English/Welsh Family History looks at will records. Want to unravel the tangled roots and branches of your family tree?
Become a more knowledgeable researcher with this course.
Not so long ago we just never heard of DNA being used in everyday situations. And then suddenly every detective story on TV seemed to mention the suspect’s DNA being collected from the crime scene.
In the world of family history, DNA has also emerged into the main stream. Today if you want to prove that you are descended from a certain line then you may be able to use genetics to prove it.
But then there is the shorthand that is used that can confuse us a little. You may have heard people talking about “snips” or SNPs and STRs and wondered what this has to do with anything!
I will now attempt to explain what I myself was uncertain of until I attended one of the talks by an academic at last year’s Who Do You Think You Are? Live show and then found it explained again in chapter 12 of Anthony Adolph’s book Tracing Your Aristocratic Ancestors. Pen and Sword 2013
Chromosomes are made up of special proteins and DNA. DNA is composed of numerous base-pairs of nucleotides all arranged in a double-helix shape.
In every human cell there is a nucleus that contains twenty-two pairs of chromosomes that bear autosomal DNA and one pair that decides on the gender of the human. The two sets of chromosomes are reduced down to one in a process of myosis that produces eggs in females and sperm in males.
When a man and a woman have a child the male passes on the one set of his chromosomes and mixes with the female’s one set and so the next generation inherits from its parents.
It is a complex process that causes some slight changes or mutations which are known as genetic polymorphisms. Some of these mutations include single nucleotide polymorphisms which are often abbreviated to the letters SNPs.
A single tandem repeat is known as a STR.
SNPs and STRs do not, it is believed by the scientists who understand such things, carry any useful codes needed in the creation of ourselves, but they are there.
Individual genes have two or more possible states of being and these are usually referred to by the letters A or T and C or G.
An SNP is a change detected in a gene’s state of being from, say, A to G and you may see it being called a â€œunique event polymorphismâ€. Once a SNP has occurred it will now stay the same as it is passed down the generations and so you can see how this can act as a reliable marker for â€œdeep ancestryâ€ haplogroup testing.
So what about STRs?
They are a bit different. STRs occur in a different part of the chromosome and they are a series of multiple changes caused by the addition or subtraction of the number of base-pairs. So by counting these base-pairs the DNA company get to a numerical code. The great thing about these mutations is that they occur over a shorter time than the SNPs do and so they can change over shorter spans of generations.
Y-STRs are taken specifically from the male Y chromosome and are only passed down by the father, making the Y chromosome in any paternal line practically identical.
What we are presented with is two complementary sets of results: SNPs define a person’s haplogroup, or the group of people that share the same markers that can go back many thousand of years. The second is the smaller group of people that share the same STRs who are related to each other over the last couple of thousand years or less.
The second exception is mitochondrial DNA (mt-DNA). This is only passed down from a mother to her child, but which only her daughters will pass on. This means that we have a definite marker for the female-line, in other words the mother’s mother’s mother’s (and so on) family.
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