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| Re: The Evolution of Bisexuality (in Women) and Homosexuality (in Men) (765547) | |||
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Re: The Evolution of Bisexuality (in Women) and Homosexuality (in Men) |
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Posted by JayMan on Sat Apr 16 18:05:17 2011, in response to Re: The Evolution of Bisexuality (in Women) and Homosexuality (in Men), posted by Spider-Pig on Sat Apr 16 17:35:34 2011. Evolutionary theory would predict that any trait that benefits one sex more than the other would tilt the number of offspring parents have in that direction. Attractive women have more girls (since attractiveness is more useful to girls) and aggressive men (as measured by incidence of domestic violence) have more boys as (aggressiveness is more useful to boys). It is obvious how it would work with fathers since a man could produce more X- or Y-sperm. In mothers, it could be that the uterine environment favors more X- or Y- sperm; or perhaps even the egg cells themselves are more receptive to one type of sperm than the other. |
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