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To think these DNA ancestry tests make no sense

335 replies

CarolineFields · 11/05/2024 19:41

So you get back a score of 40% Nigerian. Meaning out of the tiny scrap of DNA tested - less than 0.1% -40% of that matches the average population in Nigeria. But if those Nigerians are tested, they won't come back as 100% Nigerian, so 40% of 0.1% matches people who are likely to be told they are 50% not Nigerian?

And if you are in Iceland when you have that test, you are told you are 40% Nigerian, but someone in Australia can be told they are 80% Icelandic due to being compared to you and you cohort?

OP posts:
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GrouachMacbeth · 13/05/2024 08:41

The more people who register and send in DNA, the more it will change an accurately reflect your background.

Dh's came back 70% Scandinavian, so we went to IKEA, stocked up on meatballs and lignonberry jelly. And had a jolly decent meal there too!

5YearsLeft · 13/05/2024 08:39

CarolineFields · 13/05/2024 04:44

absolutely, except it wont be 1, for each of these catagories, it will be tens of thousands

( celt is a tricky one though, as it does not refer to an inheritance, but a form of art. People were celts if they made celtic art, it wasn't anything to do with being related, and does not have a firm definition- Celts were a ruler class who invaded the West of UK, and dominated the Brits from there, but yes, you are right, whoever and whatever the were , we are all decended from them)

Edited

Now I know this thread isn’t real. People were Celts if they made Celtic art? “‘Celt’ was just a term for leader.” So it wasn’t the languages, religion, geography, or…, like every single history says? Lulz. This thread, the denial of science and general zaniness, must be a huge joke based on the fact that everyone today thinks that they’re related to Vikings and they aren’t and Viking was just a job description.

OVienna · 13/05/2024 08:38

I'm an adoptee and have done these tests. I found birth relatives. Parts of the ethnicity results could be matched to areas of the globe where I could see from physical records my ancestors came from. Other categories are hugely broad and don't tell you much. It can vary a lot between testing companies.

cakeorwine · 13/05/2024 08:26

sashh · 13/05/2024 08:10

I agree on the two parents but even today there are people who marry their cousin so the numbers don't always grow in a binary way.

Even if they did you would get to the point that the number of great great great... grandparents exceeded the population.

The choice of who you breed with is also limited by the community you live in. An isolated village might have most people related to each other.

I know it's not binary.

But it just takes 1 new person in the gene pool to start a spread of new genes and new chromosome 1 etc

And don't forget - we all started out as a few individuals a long time ago.

cakeorwine · 13/05/2024 08:24

Misthios · 13/05/2024 07:58

As I said, a family tree of EVERYONE in the UK would be interesting.

It would.

But impossible to create. Because for the bulk of people who were ordinary, working people, once you get into the mid-18th century you start to struggle to document the basics of births/marriage/deaths. You have no census pre-1841. No newspapers. If you can find an ancestor who at that stage was notable or a member of the aristocracy you might be lucky and they have a documented genealogy - but they aren't always accurate.

Autosomal DNA testing is not going to help beyond 5-6 generations. Y-DNA might, but you'd have to test every male, and then you still have to work out the women.

I know it's impossible

But it would be interesting.

sashh · 13/05/2024 08:10

cakeorwine · 12/05/2024 09:28

You have 2 parents, 4 grandparents, 8 great grandparents, 16 great great etc - so think how many people have contributed to your 23 pairs of chromosomes over time?

And where did they all come from?

If you looked at both your chromosomes 1 - which of those relatives did it come from?

And if you looked at your chromosome 2 - which of those relatives did it come from?

What does it all mean about "where you come from?" - and that's just your chromosomes.

Your relatives are different - you have so so so many ancestors.

I agree on the two parents but even today there are people who marry their cousin so the numbers don't always grow in a binary way.

Even if they did you would get to the point that the number of great great great... grandparents exceeded the population.

The choice of who you breed with is also limited by the community you live in. An isolated village might have most people related to each other.

Misthios · 13/05/2024 07:58

As I said, a family tree of EVERYONE in the UK would be interesting.

It would.

But impossible to create. Because for the bulk of people who were ordinary, working people, once you get into the mid-18th century you start to struggle to document the basics of births/marriage/deaths. You have no census pre-1841. No newspapers. If you can find an ancestor who at that stage was notable or a member of the aristocracy you might be lucky and they have a documented genealogy - but they aren't always accurate.

Autosomal DNA testing is not going to help beyond 5-6 generations. Y-DNA might, but you'd have to test every male, and then you still have to work out the women.

RedHelenB · 13/05/2024 07:54

IAmThe1AndOnly · 11/05/2024 21:14

I know someone who did one of these and it told her that her father was not her father. Except that when they visited a professional geneticist the DNA showed that he was.

That is terrible

cakeorwine · 13/05/2024 07:50

Ritasueandbobtoo9 · 13/05/2024 05:25

That is wrong though. I have no Viking ancestry. I have Anglo-Saxon and Celtic. The Vikings didn’t reach where I live at all. There are people in Wales who migrated from what was Spain, this is why some Welsh people are dark skinned.

So you are saying that if you did a family tree that traced ALL your ancestors back over 1200 years, not one of them would have been a Viking?

cakeorwine · 13/05/2024 07:49

CrunchyCarrot · 13/05/2024 07:00

I highly doubt we English are all descended from Edward I, some of us will be related to Edward I, but not descended from him.

Whilst looking into this idea I came across this interesting comment (with a discussion following it) from someone on Reddit who pretty much demolishes OP's assertions.

https://www.reddit.com/r/Genealogy/comments/1bcb7ij/no_you_arent_descended_from_royalty_like_edward/

Edward I was around 800 years ago. How many ancestors do you think he has?

Obviously people didn't move around as much and relations / etc were much closer in closed communities but there are many ancestors and it just takes a bit of movement to start a whole new chain of people. Just takes one to marry a "commoner" or for mistresses etc and a whole new tree starts

Which you can see people saying in the comments

And "all descended from" is the wrong word - as we have many descendents and it's likely that a chromosome we have could have come from Edward I. But with all that DNA crossover, who knows how similar it really is.

As I said, a family tree of EVERYONE in the UK would be interesting. Given the typical Brit, how far up the tree could you go to find a common ancestor for say 95% of British people?

Misthios · 13/05/2024 07:44

Everyone English is a direct descendent of Edward 1 - why dont these so called DNA identity tests tell you that?

FOR THE 95TH TIME....

Because they are looking at 5-6 generations back at best, and Edward I died over 700 years ago. Hope that helps.

CrunchyCarrot · 13/05/2024 07:00

I highly doubt we English are all descended from Edward I, some of us will be related to Edward I, but not descended from him.

Whilst looking into this idea I came across this interesting comment (with a discussion following it) from someone on Reddit who pretty much demolishes OP's assertions.

https://www.reddit.com/r/Genealogy/comments/1bcb7ij/no_you_arent_descended_from_royalty_like_edward/

Ritasueandbobtoo9 · 13/05/2024 05:25

CarolineFields · 12/05/2024 21:39

If you are British or European, you are descended from Vikings. (or Asian, or North American or North African)

That is wrong though. I have no Viking ancestry. I have Anglo-Saxon and Celtic. The Vikings didn’t reach where I live at all. There are people in Wales who migrated from what was Spain, this is why some Welsh people are dark skinned.

CarolineFields · 13/05/2024 04:51

I am using Vikings as an example, but for any one European, choose any Viking from 1000 AD at random, and that individual will be in your family tree MILLIONS of times.

Also choose any so-called "celt"

OP posts:
WalkingaroundJardine · 13/05/2024 04:47

Mine was very accurate. I am not 100% British and it reflected back what I understood of my family history on both sides of the family, including the specific regional areas. I used AncestryDNA.

CarolineFields · 13/05/2024 04:44

cakeorwine · 12/05/2024 23:16

Where do you think our descendents came from? We have loads of descendents - if you got a family tree of everyone in the UK's ancestors and went back far enough, do you think there would be a whole range of people in there -

including people who were Vikings, Celts etc and then you go back further and further and further until you get back to Africa

Do you think iit's wrong to say that a lot of British people will have at least one ancestor who was a Viking?

It's also true to say that a lot of British people will have at least one ancestor who was a Celt.

Chances are they have at least one ancestor who was from Normandy

absolutely, except it wont be 1, for each of these catagories, it will be tens of thousands

( celt is a tricky one though, as it does not refer to an inheritance, but a form of art. People were celts if they made celtic art, it wasn't anything to do with being related, and does not have a firm definition- Celts were a ruler class who invaded the West of UK, and dominated the Brits from there, but yes, you are right, whoever and whatever the were , we are all decended from them)

OP posts:
CarolineFields · 13/05/2024 04:42

But I am just using the Vikings as an example, to show what drivel these so called ethnicity DNA tests are - All Europeans are conclusively and indisputably descended from Vikings, so why don't these tests tell everyone that?

Everyone English is a direct descendent of Edward 1 - why dont these so called DNA identity tests tell you that?

OP posts:
CarolineFields · 13/05/2024 04:40

steff13 · 12/05/2024 23:28

That is disappointing. My favorite baseball team uses a "Viking' helmet in their home run celly. As evidenced here by my favorite player.

The horned helmets were just a hollywood invention so you could see who was who in battle scenes

OP posts:
CarolineFields · 13/05/2024 04:39

5YearsLeft · 12/05/2024 23:46

I’m not here to fight or to goad or to share my opinion. I shared an actual scientific study that used the DNA of several individuals known to be Vikings. Results: only 6% of British people have Vikings in their ancestry. What would you like me to do about it? You may have Celt, or Norman, or Saxon, or Moor, or maybe even Nordic - and 6% have Vikings.

If you don’t like it, I would simply recommend you do more research yourself, and who knows? Perhaps you’ll find something that disproves me. But it’s disappointing that no one continuing these arguments has even bothered to look. It’s been quite a few years since I took logic at uni but I somehow doubt they are now accepting the argument, “Well, that’s just how it is, innit?” Because all I’ve seen is people saying all of this with not a solid fact to back them up, OP included. So I really do wish you luck (if you decide to research), but I’m done. i just can’t add anything else helpful.

Edited

It is not a case of I dont like it, it is a case of your so called "study" simply being wrong, ALL Europeans have Viking ancestory.

You can't show me where my maths is wrong, you cant show me where my conclusions are wrong, you can only dredge up a bit of rubbishy pop media science and call it "an actual scientific study" which goes to show how few people understand the words "scientific study" or understand the "studies" they quote

OP posts:
CarolineFields · 13/05/2024 04:36

5YearsLeft · 12/05/2024 23:50

Good point. I do hope you’re OK, @CarolineFields . If this was just a troll post, no worries. If this is real, and you have this rigidity of thinking, saying the same thing again and again, it’s a bit concerning. Maybe give up the Vikings for a bit, and get some fresh air.

By "rigidity of thinking" do you mean knowledge? YOu do have to repeat yourself on MN because people dont always read the whole thread

OP posts:
CarolineFields · 13/05/2024 04:35

5YearsLeft · 12/05/2024 22:49

Nope. I’m not doing this shite with you again. I explained the whole Bronze Age thing, you refused to listen. I don’t know why you’re obsessed with Vikings but tell you what, you win, you’re super special, we can all go home now.

you have not read or understood what I have said

OP posts:
5YearsLeft · 12/05/2024 23:50

SabreIsMyFave · 12/05/2024 23:35

@CarolineFields Are you OK? Serious question.

Good point. I do hope you’re OK, @CarolineFields . If this was just a troll post, no worries. If this is real, and you have this rigidity of thinking, saying the same thing again and again, it’s a bit concerning. Maybe give up the Vikings for a bit, and get some fresh air.

5YearsLeft · 12/05/2024 23:46

cakeorwine · 12/05/2024 23:16

Where do you think our descendents came from? We have loads of descendents - if you got a family tree of everyone in the UK's ancestors and went back far enough, do you think there would be a whole range of people in there -

including people who were Vikings, Celts etc and then you go back further and further and further until you get back to Africa

Do you think iit's wrong to say that a lot of British people will have at least one ancestor who was a Viking?

It's also true to say that a lot of British people will have at least one ancestor who was a Celt.

Chances are they have at least one ancestor who was from Normandy

I’m not here to fight or to goad or to share my opinion. I shared an actual scientific study that used the DNA of several individuals known to be Vikings. Results: only 6% of British people have Vikings in their ancestry. What would you like me to do about it? You may have Celt, or Norman, or Saxon, or Moor, or maybe even Nordic - and 6% have Vikings.

If you don’t like it, I would simply recommend you do more research yourself, and who knows? Perhaps you’ll find something that disproves me. But it’s disappointing that no one continuing these arguments has even bothered to look. It’s been quite a few years since I took logic at uni but I somehow doubt they are now accepting the argument, “Well, that’s just how it is, innit?” Because all I’ve seen is people saying all of this with not a solid fact to back them up, OP included. So I really do wish you luck (if you decide to research), but I’m done. i just can’t add anything else helpful.

SabreIsMyFave · 12/05/2024 23:35

@CarolineFields Are you OK? Serious question.

steff13 · 12/05/2024 23:28

Createausername1970 · 12/05/2024 21:46

They got around a bit by all accounts. I am just reading David Mitchell's book and apparently they didn't have horns on their helmets, which is disappointing.

That is disappointing. My favorite baseball team uses a "Viking' helmet in their home run celly. As evidenced here by my favorite player.

To think these DNA ancestry tests make no sense
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