>>12283949> Ignore skin color being more a product of environmental selection than anything elseThis sentence is retarded. My reply is directed towards this statement alone. If you don’t know how phenotypic variance is partitioned, and how selection can ONLY act on variation in allele frequency or that human skin pigmentation variation is due almost exclusively to GENETIC differences then you are not capable of talking about human evolution at all. Environmental selection has a completely different meaning in ecology and developmental biology than natural selection which you’ve substituted here. You’ve also mixed, backtracking, environmentally induced variation with genetic variation, and then included the word selection, while genetic variation can be due to many factors. You’re just fucking stupid desu and don’t seem to know much about evolution.
>>12283959No, he is saying that human skin pigment variation is due to environmental factors. It is not, the environment does not lighten your skin to the degree seen among boreal populations. Mutations exist that are favored under certain conditions. That is not what he said at all. Evolutionary dynamics specifically tells you that the response to selection is higher if the trait is highly heritable and if there is a large selection differential. there is for skin pigmentation extremely high heritability and very strong selection, so there was a rapid response among northern populations called a selective sweep which, including many other traits like light hair and later lactose tolerance, differences in skin thickness, characterizes profound genetic differences in those populations compared to african populations. Read the original post, that is the context for my replies, not simply the statement i quoted.