is there some sort of cutoff point where scientists decided “everyone in Ireland 100,000 years ago will be considered 100% Irish”?
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There’s an arbitrary cut-off point where we don’t look further back. That’s also how we now have “Americans” instead of “English, French, Dutch” etc people. They technically origin from those countries, but we all agree that after 4-ish generations that doesn’t matter as much.
There’s then genetic markers you can follow that slightly differ based on region, which lets you differentiate between African/ European/ Asian etc
Technically if we didn’t decide on a cut-off point, we could consider everyone African.
Ancestry.com said My DNA was 65% from western Ireland; they even had it narrowed down to a small town near Galway. A year later, most of that moved up to Scotland, where the clan supposedly originated from before migrating there.
So I suppose I’ll move closer to Africa as the updates continue to come in. 😂
Not 100% of humanity’s DNA was created in Africa 100,000 years ago. Humans, like any other living creatures, are constantly evolving. That is why chinese people don’t look the same as indian people, who don’t look the same as arab people, who don’t look the same as east african people, who don’t look the same as west african people, and so on.
AA Vale is right, of course but you are not correct in looking for any 100% matches as no human except identical twins (or other homozygous individuals) are 100.000% identical. As you know, we share an amazing proportion of genes with snails but there are as many dissimilarities between your DNA and an African person of the same gender as you as there are between you and your next door neighbours.
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