“Our analysis reaffirms that race and ethnicity are social constructs that do not have a basis in genetics” In what sense is race not genetic?
I'm going to assume that what they're trying to imply is that some sizable share of genetic information is shared across all humans and the information that is typically used to separate us into racial and ethnic categories is a very small subset (imagine some genetic 'knobs' for hair color, skin color, stature, morphology, etc). Their argument seems really fucking stupid when you consider that we share an estimated…
What they're saying is that they're no genetic components that do this at all.
There's no "black dna" or "Asian dna" or genetic component that is present in all peoples of a particular "race" that separates them from other "races".