Let me put this in context, if you have a drop of European ancestry, not only are you 100% certain to be a direct descendant of Charlemagne, every single person who was alive in 900AD who has living decedent is also your direct Great---*-grandparent.
At that stage you would have had 1,125,000,000,000,000 other great grandparents besides Charlemagne. Obviously there weren’t that many people alive at that time, but every Frank, Jew, Basque person alive at that time in your direct line.
If you don’t get the reason why someone may test for a marker that shows up in Iranians and then use that to claim that they are English I would suggest more research.
While science can trace some flows of some populations, they typically are only looking at one in 2[sup]n[/sup] family members using yDNA and mtdna. The aDNA is not as conclusive as you would think for mapping individuals to specific areas.
In the case of the peoples who were in the Americans before European colonization the estimate is that the effective population that came across was around 70 individuals.
These DNA testing companies go off of a base Asian sample and then track a few changes and apply the “Native American” label to everyone.
People are just really bad at math or are way too optimistic that inbreeding was consistent over time and buy into the ethnic origins estimates.
While you can get a gist about it, the problem becomes when you try and use those changes to make claims based on eugenic racial categories. Which is what Warren did here.
“Hey look I have some Eurasia DNA, obviously I am Welsh”
When you do this and ignore the very real impact of racism on minorities, and that culture and heritage are separate from DNA you are marginalizing the differences that doe make these groups interesting while also minimizing their culture.
Note that I appear to be the only person actually posting the various people who are categorized in this groups voice. Why are you so quick to dismiss their concerns? why is Senator Warren’s feelings about being called out on a lie more important than their voices?
Because that is the effect of re-enforcing this debunked eugenic racial theories.