The New York Times has an article about a study of 90 students at Penn State who took complex genetic tests and found that most of them weren’t pure anything.
This wasn’t just true of white students.
“Ostensibly “black” subjects, for example, found that as much as half of their genetic material came from Europe, with some coming from Asia as well.”
I wish I’d been one of the test-ees. My great-great grandmother was Cherokee. That’s the only non-European blood admitted to in my family. But there are some ethnic markers that we all wonder about. I’d be interested in knowing where we match up.