DNA ancestry testing is mediocre

This probably doesn't surprise you, but while mail-in DNA tests to determine ancestry have some validity, they aren't terribly reliable. In some cases identical twins (who by definition share the same DNA) show somewhat different results even when tested by the same outfit, and for that matter your own DNA might not come back the same especially when tested by more than one company. In the video below Dr Aaron Carroll explains why this type of analysis isn't perfect.

Link: https://youtu.be/P4Y1HM5vaxk



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