Sexually antagonistic selection: the evolution of male homosexuality
Homosexuality has long been difficult to explain in terms of natural selection, as homosexuals reproduce at a lower frequency than their heterosexual counterparts. This would seemingly doom genes related to homosexuality to extinction. However, the fact that homosexuality exists in such a large variety of species suggests that it in some way offers an evolutionary advantage. Otherwise, genes that code for homosexuality would die off (off course this presupposes that you believe homosexuality is determined by nature as opposed to nurture). While homosexuality may not be entirely hereditary, evidence strongly suggests it is largely determined by genetics. Proof of this is the high rate of homosexuality in identical twins, at least for males. Read the rest of this entry »
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