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Dro-Darsha t1_j06pzen wrote

Reply to comment by liquid_at in What is the evolutionary advantage of primates losing endogenous Vitamin C production? And are there nowadays humans who are able to produce their own Vitamin C? by yeetussonofretardes

And it's not just that the gene can spread. New broken versions of the gene will keep popping up everywhere all the time. Without a mechanism to sieve those out, they will eventually drown out the working versions by sheer numbers.

You could also say: the advantage is that your offspring doesn't have to die if the gene has mutated.

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