How long does it take for Humans to change their Skin color? How many generations or years after Humans came north did it take for them to “loose” their dark skin?
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They had to wait for a mutation with low melanin to occur (white skin), then the advantage of higher rates of vitamin D production meant all their offspring had an evolutionary advantage over the others and so more of their offspring survived and bred the next generation eventually it becoming the dominant strain. In all it likely took over 100 generations.
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