If you were not referring to extinct branches I don't know why you thought "they would likely represent two clusters" if they did not already in the clustering given.
> Afro-American people have the biggest genetic diversity in America and their genetic subgroups are so distinctive that they require separate testing in clinical studies.
Yes, and?
> I bet you won’t be able to tell the difference between them from their appearance though.
Maybe, and?
> Now good luck redefining the concept of race with this knowledge.
Good luck trying to deny biological race when you've just listed more evidence for it.
If you were not referring to extinct branches I don't know why you thought "they would likely represent two clusters" if they did not already in the clustering given.
> Afro-American people have the biggest genetic diversity in America and their genetic subgroups are so distinctive that they require separate testing in clinical studies.
Yes, and?
> I bet you won’t be able to tell the difference between them from their appearance though.
Maybe, and?
> Now good luck redefining the concept of race with this knowledge.
Good luck trying to deny biological race when you've just listed more evidence for it.