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But, it was the pigeons that we noticed most, males pairing off with males. Darwin's theory of evolution by natural selection implies that genes have to get themselves passed on to the next generation, or they will die out. Rather, it seems though data is somewhat limited that certain sections of genetic code occur in versions that are more frequently associated with homosexuality than by chance. Bagemihl's research shows that homosexual behavior, not necessarily sexual activity, has been documented in about species as ofranging from primates to gut worms. And once a female forms a pair-bond, the species' tendency towards monogamy means it becomes life-long.





Anatidae " PDF.

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Animal Homosexuality and Natural Diversity illustrated ed. Study of this unique genitalia and aggressive behavior in the female hyena has led to the understanding that more aggressive females are better able to compete for resources, including food and mating partners. Vietnamese Journal of Primatology.

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However, in addition to homosexual behavior, several abnormal behaviors were also exhibited apparently due to this mutation.