Quote:
Originally Posted by Orruar
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When I say sunlight exposure is the only real factor in skin tone, I mean from a genetic selection point of view. If you stick a group of people in Iraq and have them breed for dozens of generations, you'll end up with darker skinned folks. I wasn't suggesting it was only an environmental influence for a single generation.
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Genetic selection... I'm not sure how environment has any factor in this. Mutations?? If you stick western Europeans into say Africa would they eventually become black skinned people in a given amount of generations? No. It's a loss of information, it can't be reversed without reintroducing the genes that were stripped away. Much like you can't breed a pair of bulldogs back into wolves. It's just a product of micro-evolution, changes within a breeding selection determining outcome. Maybe you are trying to apply macro-evolution theory to this, which I don't see as a real contributing factor within inter-racial breeding. A dog is a dog. A human is a human. It's all within the same race and no real divergences from that as far as medical science is concerned. Unless you are hinting at something else.