Skin color

Gene Expression

Tag archives for Skin color

Over the history of this weblog I have blogged about pigmentation a fair amount. The major reason is that that’s where the money is; unlike height, let alone intelligence, the genetic architecture and evolutionary history of pigmentation has been elucidated with relative clarity. That is, we know roughly the number and nature of the genes…

Skin color is not race

One of the peculiarities of American discussion about race is that skin color is assumed to be synonymous with racial distinctions. That is, skin color is not just a trait, but it is the trait which defines between population differences. There’s a reason for this, the skin is the largest organ and it is very…

Folate & fertility & skin color

On the order of ~1 million years ago humans seem to have evolved dark skin. While light skin evolved several times, it looks like dark skin exhibits an “consensus sequence,” so that all dark skinned peoples seem to have the same genetic architecture. This chart (from Signatures of Positive Selection in Genes Associated with Human…