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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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Nottodaty · 13/05/2024 23:29

Ours was fairly accurate. My paternal Granny was adopted and we managed to trace family back to an area in Ireland. We’ve also managed to find closer family.

The flip side is my maternal Grandfather- his father was unknown & I’ve not managed to work out any family links or areas!

I think anyone that does do these has to step through it cautiously as my DNA being there has caused someone pain as it turns out the person they thought was their father isn’t & it’s someone from my family - they’ve not reached out and I’m not reaching out to my family to cause upset the other way. So I’ve ended up with having to keep a secret.

GaryLurcher19 · 13/05/2024 23:28

SummerFeverVenice · 13/05/2024 23:16

You know what I meant FFS, I’m not some Victorian who thinks we literally descended from modern day chimps. My original post didn’t even say “modern lemur”

Edited

Actually, I don't know what you mean. To take lemurs as the example that you offered, they are a branch of the primate family, arriving relatively recently in mammalian history. Anyone reading your comment with credulity would be forgiven for thinking all mammals evolved from lemurs, with modern lemurs being one branch that changed little. Not the case.

DrJonesIpresume · 13/05/2024 23:23

Misthios · 11/05/2024 22:35

No @CarolineFields you're wrong.

My "ethnicity report" comes back very firmly to SE Scotland. But none of my strongest matches are in SE Scotland, they are in America, Australia, South Africa. Quite obviously I do not have S African or Australian roots.

Ancestry explains how they calculate the ethnicity reports here: https://www.ancestry.co.uk/c/dna/ancestry-dna-ethnicity-estimate-update - it's all about reference panels, people like me whose ancestors lived in the same place forever and ever and have done a family tree properly, not just clicked and added loads of hints.

Obviously we're all a mix and depending on the level of information they might not be able to determine anythign more precise than West Africa or SE Asia or something.

I'd be inclined to think that your results mean that your ethnicity is SE Scotland, and you and your matches share those common ancestors whose ethnicity was SE Scotland, but theirs left Scotland and ended up in America, Australia and South Africa.

Similar to Welsh people finding out that they have matches in Patagonia.

KrisAkabusi · 13/05/2024 23:22

No real genuine history talks about the Celts, just the children's histories, older Victorian histories, and those based on the tudor fairy tales.

You might want to tell for example, these people
https://www.dias.ie/celt/

or these
https://www.maynoothuniversity.ie/school-celtic-studies

or any of the many other University departments of Celtic Studies in Ireland, the UK, Europe or North America that they are not studying genuine history!

School of Celtic Studies – DIAS

https://www.dias.ie/celt

SummerFeverVenice · 13/05/2024 23:16

GaryLurcher19 · 13/05/2024 23:12

No. Even if the common ancestor we share with all other mammals was 'lemur-like' that is not the same as us descending from modern lemurs. Lemurs are as descended and different from that concestor as we are.

You know what I meant FFS, I’m not some Victorian who thinks we literally descended from modern day chimps. My original post didn’t even say “modern lemur”

GaryLurcher19 · 13/05/2024 23:15

I've watched this thread all day with some amusement, but I can't bear total misinfobollox.

Sorry.

SummerFeverVenice · 13/05/2024 23:15

CarolineFields · 13/05/2024 22:42

It is nothing to do with what I think or want, that is the scientific definition of "celtic". (and originates around Spain). Of course people can choose to use the word in other ways, but it is a social invention. Nothing wrong with that, if people like doing it, but this thread is talking about genetics and origins, and in that context, there is no "celtic"

FFS, all names of all ethnicities are social inventions. Celtic is ethno-linguistic grouping that had multiple ethnicities within it. Similar to Jews, they are an ethno-religious grouping with multiple ethnicities within it- ethnicities even from different races.

GaryLurcher19 · 13/05/2024 23:12

SummerFeverVenice · 13/05/2024 23:04

Before apes evolved, we were lemur-like mammals 47 million years ago. So yeah we sorta are descended from lemurs.

It’s an indicator of where your ancestors were from 6 generations ago. So you are from there too. Just because humans migrated in waves for millenia, it doesn’t mean you aren’t “from” different places and different times.

Where you are from isn’t an origin pin on a map where ancestor zero lived. Ancestry can be as a simple as a person in Chile finding out their Spanish ancestry as civil war refugees from Spain, migrating to France picking up an ancestor there, then becoming WWII refugees to England picking up another ancestor and then emigrating in the 70s to Chile and adding a Native American ancestor to the mix there. It is deeply interesting to be able match up DNA to family written and oral histories, or find out if a family story is fiction.

No. Even if the common ancestor we share with all other mammals was 'lemur-like' that is not the same as us descending from modern lemurs. Lemurs are as descended and different from that concestor as we are.

SummerFeverVenice · 13/05/2024 23:04

cakeorwine · 13/05/2024 22:40

It's not lemurs we are descended from

But this is the point.

It's not "where are you from". It's just an indicator of where some of your ancestors may have been 6 generations ago.

Before apes evolved, we were lemur-like mammals 47 million years ago. So yeah we sorta are descended from lemurs.

It’s an indicator of where your ancestors were from 6 generations ago. So you are from there too. Just because humans migrated in waves for millenia, it doesn’t mean you aren’t “from” different places and different times.

Where you are from isn’t an origin pin on a map where ancestor zero lived. Ancestry can be as a simple as a person in Chile finding out their Spanish ancestry as civil war refugees from Spain, migrating to France picking up an ancestor there, then becoming WWII refugees to England picking up another ancestor and then emigrating in the 70s to Chile and adding a Native American ancestor to the mix there. It is deeply interesting to be able match up DNA to family written and oral histories, or find out if a family story is fiction.

User2460177 · 13/05/2024 23:02

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?

Yeah - neither of these “facts” are facts

GaryLurcher19 · 13/05/2024 22:47

Misthios · 13/05/2024 22:29

@GaryLurcher19 i think that’s been very much proven in this thread!! Although of course anyone can claim a degree in anything, can’t they?

Oh yes! Though it becomes very apparent who is fibbing to those whom do have a higher education in genetics or evolutionary biology. 😂

Saying nowt more because I don't want to spoil it. 🍿🍺

Karensalright · 13/05/2024 22:47

Oh i get it!

Caroline means the Celts are not a genetically identifiable ethnic group, they have a collection of traditions and habits developed over a millennium that give them links to each other (music rifts, kilts, dance, irish bagpipes Scottish bagpipes, language links)

CarolineFields · 13/05/2024 22:42

EatMoreFibre · 13/05/2024 18:57

Since you have given this some thought OP, do you have any suggestions as to what we should be calling Celtic languages? You say the term Celt / Celtic should be used only to describe a type of art. The term Celtic has been used to describe a group of related languages (Welsh, Breton, Irish Gaelic, etc.) since the early 1700s so it's well established. According to you however it is incorrect. What would the correct term be?

TIA

It is nothing to do with what I think or want, that is the scientific definition of "celtic". (and originates around Spain). Of course people can choose to use the word in other ways, but it is a social invention. Nothing wrong with that, if people like doing it, but this thread is talking about genetics and origins, and in that context, there is no "celtic"

OP posts:
Misthios · 13/05/2024 22:41

how many fecking times….. I don’t deal with “countless generations”. And I’m not interested in the deep philosophical questions of where dna comes from. You are being very weird.

cakeorwine · 13/05/2024 22:40

SummerFeverVenice · 13/05/2024 22:33

It’s not meaningless if you want to know where your 64 ancestors were 6 generations ago. Many people do want to know.

Is studying modern history also meaningless then? It’s from the same time period.

Not everyone wants to find out which lemur we all descended from millions of years ago.

It's not lemurs we are descended from

But this is the point.

It's not "where are you from". It's just an indicator of where some of your ancestors may have been 6 generations ago.

cakeorwine · 13/05/2024 22:38

Misthios · 13/05/2024 22:32

@cakeorwine amd that’s where you’re wrong. Anyone working as a genealogist will have to know how to interpret autosomal or y dna tests given that so many people do them. But what do I know, it’s only my job.

Great.

So please explain where your DNA comes from?

You have 23 pairs of chromosomes.
They were passed down over countless generations, subject to crossover during meiosis, mutations but ended up in you.

So where does your DNA come from and what does that mean about "where you " come from and your ancestors?

SummerFeverVenice · 13/05/2024 22:33

cakeorwine · 13/05/2024 22:31

It's meaningless.

You do agree that your DNA comes from people who were alive 1000s and 1000s of years ago and over time, it's been passed down, mutated,, been crossed over between chromosomes and eventually ended up in you.

So where "does your DNA come from?" and what does it mean?

It’s not meaningless if you want to know where your 64 ancestors were 6 generations ago. Many people do want to know.

Is studying modern history also meaningless then? It’s from the same time period.

Not everyone wants to find out which lemur we all descended from millions of years ago.

Misthios · 13/05/2024 22:32

@cakeorwine amd that’s where you’re wrong. Anyone working as a genealogist will have to know how to interpret autosomal or y dna tests given that so many people do them. But what do I know, it’s only my job.

cakeorwine · 13/05/2024 22:31

SummerFeverVenice · 13/05/2024 22:28

It’s not arbitrary.

It's meaningless.

You do agree that your DNA comes from people who were alive 1000s and 1000s of years ago and over time, it's been passed down, mutated,, been crossed over between chromosomes and eventually ended up in you.

So where "does your DNA come from?" and what does it mean?

Misthios · 13/05/2024 22:29

@GaryLurcher19 i think that’s been very much proven in this thread!! Although of course anyone can claim a degree in anything, can’t they?

cakeorwine · 13/05/2024 22:28

Misthios · 13/05/2024 22:05

Genealogists. With an “a”. 🙄

dna testing is a big thing in the genealogy world. Thought you’d know that, what with your genetics degree.

the university of Strathclyde have a genetic genealogy conference next month. Maybe you should attend. You might learn something. https://www.strath.ac.uk/studywithus/centreforlifelonglearning/genealogy/advancinggeneticgenealogy/

I don't have a degree in genetics - and I am also pretty sure that you don't need a deep understanding of genetics to be a genealogist.

Just the ability to trace family trees, research births, deaths etc and look up records.

I don't think that family trees go back to Neanderthal times but I know that using DNA is very useful to see how we have evolved over time and spread over the millenia.

SummerFeverVenice · 13/05/2024 22:28

cakeorwine · 13/05/2024 22:25

It doesn't really mean anything anyway.

Ultimately, we all descend from a tiny group of humans a long long time ago.

It seems arbitrary to talk about "where we come from" when we have so many ancestors.

But we just stop at 200 years.

It’s not arbitrary.

cakeorwine · 13/05/2024 22:25

SummerFeverVenice · 13/05/2024 22:12

@cake or wine, I said you only inherit around 1% of your DNA from “a 4G grandparent” you have 64 of them. Please read a bit slower, as you are missing key qualifiers.

It doesn't really mean anything anyway.

Ultimately, we all descend from a tiny group of humans a long long time ago.

It seems arbitrary to talk about "where we come from" when we have so many ancestors.

But we just stop at 200 years.

GaryLurcher19 · 13/05/2024 22:21

Misthios · 13/05/2024 22:05

Genealogists. With an “a”. 🙄

dna testing is a big thing in the genealogy world. Thought you’d know that, what with your genetics degree.

the university of Strathclyde have a genetic genealogy conference next month. Maybe you should attend. You might learn something. https://www.strath.ac.uk/studywithus/centreforlifelonglearning/genealogy/advancinggeneticgenealogy/

Having a degree in genetics doesn't involve knowing anything about 'genealogy'.

Not having a go, but it simply doesn't.

Genealogists may need to understand a bit about genetics, but geneticists don't need to know a single thing about genealogy.

FluffyDiplodocus · 13/05/2024 22:18

I do a lot of genealogy and know to take the ethnicities with a pinch of salt. But I was impressed when my grandmother's DNA test showed a small chunk of French and a decent sized chunk of Germanic Europe, as her mother was illegitimate and I've later realised from DNA matches that the father was one of two brothers (in the very next household) whose grandfather was born in France. I manage several other test results for other family (different lines to my Nana) and none of them have even a tiny bit of French DNA!