Less pressure though - pressure to be in the 9 of 10 that make it vs being the 1 of 10 that do is very different.
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Replying to @CovfefeAnon @GorhamHarland
IIRC, something like 25% of European women didn't reproduce over time.
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It's basically the baseline - x% of everyone died in childhood, to famine, etc. Selective pressures above that were on men; different ones that were less strong were on women.
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Right, less strong, but not nonexistent.
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Replying to @TEDxHamster @CovfefeAnon and
IIRC, strong sexual selection on males reduces overall fitness. Happens in herd animals and some birds (the more dimorphic ones) I think.
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Replying to @The_WGD @TEDxHamster and
Yes, sexual selection can trade off with natural selection - peacocks are the classic example but clearly that event wasn't sexual selection.pic.twitter.com/tT7Aog9sU2
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Replying to @BomptonC @CovfefeAnon and
Why are we so sure that the one wasn't and the other, which looks an awful lot like it structurally, is?
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The current era seems more unprecedented than anything - mtDNA lineages going extinct - not them all continuing while a few Y lineages continue.
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