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Interesting video, I haven’t seen this one yet! I get the feeling, however, that the producer has an agenda to pursue. If I understand him correctly, he accounts for allelic frequency. In this sense, he is correct; people from different regions share alleles more frequently. However, he shies away from the prevalence of single nucleotide polymorphisms (SNPs). These single base changes most frequently have a neutral effect as opposed to a beneficial or deleterious one. These rare changes alter alleles. Over long periods of time, SNPs cause a change in allele frequency between populations without affecting observable phenotypes. If you’d really like to argue for race as a biological construct, I would begin to look at presence of genetic information from other species (Neanderthal, viral, etc.) or the occurrence of traits due to high selective pressures (lactase persistence and sickle cell heterozygotes come to mind). I hardly see either of these things as enough to give rise to distinct races. Obviously that is an opinion. I’ll post some links when I get access to a computer.
My honest question to you is what would you consider a race? Assuming distinct races do exist, globalization yields a confounding problem. Is a blending between two races a new race? If you crossed race A and race B between two different couples, the two offspring would have different proportions of traits from race A & B. Are these two children the same race or a different race? What about people along city/country/continental borders? But now I’m just babbling. Hope this finds you well 🙂