I would like to sample my genome to have an idea of my ancestry history but I'm not comfortable with giving it away to companies
Aboriginal Australian genomes reveal Indian ancestry (2013)
201–210 of 231 posts
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#202Earlier quoted context omitted.
Lewontin came to that conclusion by examining exclusively blood type alleles, which was kind of asinine because they have no apparent geographic distribution pattern at all. Other genetic markers tell a much clearer story, as the principal component analysis shows. It couldn't really be any more obvious - the PCA makes a map . You can literally see each of the continents represented in a projection of genetic data.
Something like 30-50% of all human genetic variants are shared across continents. It's hardly asinine to say that a significant proportion of genetic variation is shared with everyone. Depending where you are talking about, ~20% of variation is unique to a given continent. I don't think PCA plots really tell us much beyond there being distinct genetic clusters? One could do a PCA only on people with european ancestry…
"One could do a PCA only on people with european ancestry, or people living in a small town"
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#203Earlier quoted context omitted.
> As we gather more data our understanding of human migration inevitably clashes with identity politics/nationalism and previous simplistic pre-scientific classifications based on skin color and facial features Does it? Because most studies find that people living in the same country are indeed more closely related to each other than to people of different countries, roughly according to what you would expect from ge…
Yes, ppl in the same country have more similar genomes. But modern population genetics has found that 1. There is more similarity than difference between any 2 humans on earth (there are africans and europeans who share more dna than with others of their own ancestry. And, 2. People move around, a lot! We knew this already but there are a huge number of undocumented migrations that are being revealed by these studies…
> there are africans and europeans who share more dna [with each other] than with others of their own ancestry
No, there aren't. That's not a thing.
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#204Earlier quoted context omitted.
> As we gather more data our understanding of human migration inevitably clashes with identity politics/nationalism and previous simplistic pre-scientific classifications based on skin color and facial features Does it? Because most studies find that people living in the same country are indeed more closely related to each other than to people of different countries, roughly according to what you would expect from ge…
Yes, ppl in the same country have more similar genomes. But modern population genetics has found that 1. There is more similarity than difference between any 2 humans on earth (there are africans and europeans who share more dna than with others of their own ancestry. And, 2. People move around, a lot! We knew this already but there are a huge number of undocumented migrations that are being revealed by these studies…
Man, it’s kinda scary hearing the “more similarity between any two humans” line here on HN. That one’s up there with the “we only use 10% of our brains” line, for me. My understanding is that’s a pretty well documented misconception about genetic diversity which doesn’t really apply here.
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#205Earlier quoted context omitted.
Dude, they had boomerangs and digerydoos. Who needs one-way arrows when you have been droning things since the beginning.
As others have commented, boomerangs didn't work for hunting like the way they're culturally depicted. Thinking about it I have no idea how it'd even be possible to kill an animal and have the missile return given the necessary collision.
If you stun or kill the animal, it's no big deal to pick up the weapon when picking up the carcass.
But I sure would like to have a near miss not being followed by a search for the weapon.
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#206It's an emotionally charged subject, which is unfortunate as it's objectively fascinating from a purely historical perspective. The simplified and (generally) commonly accepted narrative is that a cohesive group arrived here 45-60,000YA, lived peacefully and in harmony with the land right up until Europeans arrived. There's some debate about the megafauna extinctions, but no conclusive evidence either way. (I did app…
>The simplified and (generally) commonly accepted narrative is that a cohesive group arrived here 45-60,000YA, lived peacefully and in harmony with the land right up until Europeans arrived.
This theory went down the drain when Europeans discovered Aboriginal shields (i.e. very fast). Spears and clubs are useful for hunting, shields only help against homo sapiens. They were fighting over resources just like anybody else, and their everyday lives were violent as hell, evidenced by parry fractures and skull cracks on fossil bones.
Also "living in harmony with the land" means watching your children starve to death after a dry spring.
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#207More than a decade ago I submitted my DNA to the National Genographic Project [1] which was an attempt to trace ancient human migration using Y chromosome and mitochondrial DNA from a sampling of people around the world. My paternal Y-chromosome line showed an ancient mutation (>50K year ago) carried by humans who had likely spread through a coastal migration from Africa around coasts of the Arabian Sea down to South…
In terms of progress in DNA sequencing this is quite an old news. Quite a lot of studies have been conducted since then with better sequencing techniques. David Reich, a well known researcher in the field, a student of Svante Pääbo who was awarded the Nobel Prize[1] for pioneering this field and technique, has authored a terrific book[2] synthesising all these findings.
The details are fascinating a nuanced, highly recommend this book if you would like to pursue this rabbit hole.
The book from Svante Pääbo [3] is equally fascinating which goes into the details of how DNA sequencing works to determine ancient ancestry. In a way it takes off from where the Y-chromosome study ends.
[1] https://www.nobelprize.org/prizes/medicine/2022/paabo/facts/
[2] https://www.goodreads.com/book/show/35749414-who-we-are-and-...
[3] https://www.goodreads.com/book/show/19243883-neanderthal-man
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#208Earlier quoted context omitted.
Lewontin came to that conclusion by examining exclusively blood type alleles, which was kind of asinine because they have no apparent geographic distribution pattern at all. Other genetic markers tell a much clearer story, as the principal component analysis shows. It couldn't really be any more obvious - the PCA makes a map . You can literally see each of the continents represented in a projection of genetic data.
Something like 30-50% of all human genetic variants are shared across continents. It's hardly asinine to say that a significant proportion of genetic variation is shared with everyone. Depending where you are talking about, ~20% of variation is unique to a given continent. I don't think PCA plots really tell us much beyond there being distinct genetic clusters? One could do a PCA only on people with european ancestry…
If the difference was 70 or 80% would they even be the same species?
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#209Earlier quoted context omitted.
[flagged]
I just read your comments, and you seem to be saying your subjective experience amounts to evidence (for you, which is fine) But the argument was that this was an emotionally charged topic and you displayed that while appearing to argue the opposite. As a fellow Australian, I understand the over sensitivity, especially due to the Voice crap that's going on atm. As for generalizing racially, I agree, it makes no sense…
Basically white people who - to their delight - realized they are "aboriginals".
Re: Aboriginal Australian genomes reveal Indian ancestry (2013)
#210Earlier quoted context omitted.
They're also the only culture to invent the boomerang which is a weapon that comes back to the thrower. Pretty cool if you ask me
Hunting boomerangs didn't return to the thrower. Picture a symmetrical returning boomerang you're used to, now massively shorten one of the "legs": that's the hunting boomerang I've been shown
To be a bit more specific returning boomerangs were used to hunt birds. While the non returning boomerangs you refer to were used for land animals and warfare.