3 ms·That study was only about genes for immunity, not about genes in general.by jimmyk 10y agoThat study was only about genes for immunity, not about genes in general.seanp2k2 10y agoExactly. Humans breed for more diverse immunity to increase our chances of survival.jimmyk 10y agoIs that the only factor that influences who we breed with? If so, why do humans display a strong preference for mating within their own ethnic group?