There are measures of genetic distance that happen to correlate quite nicely with perceived ancestry, even though most genetic variation is not necessarily rela

There are measures of genetic distance that happen to correlate quite nicely with perceived ancestry, even though most genetic variation is not necessarily related to it. It's just one of many genetic "signals" that barely rise above the background noise. See https://en.wikipedia.org/wiki/Genetic_distance https://en.wikipedia.org/wiki/Genetic_distance