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Pretty Boy: Difference between revisions
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There is considerable evidence that human sexual orientation is genetically influenced, so it is not known how homosexuality, which tends to lower [[reproductive success]], is maintained in the population at a relatively high frequency. One hypothesis proposes that while genes predisposing to homosexuality reduce homosexuals' reproductive success, they may confer some advantage in heterosexuals who carry them. However, it is not clear what such an advantage may be. | There is considerable evidence that human sexual orientation is genetically influenced, so it is not known how homosexuality, which tends to lower [[reproductive success]], is maintained in the population at a relatively high frequency. One hypothesis proposes that while genes predisposing to homosexuality reduce homosexuals' reproductive success, they may confer some advantage in heterosexuals who carry them. However, it is not clear what such an advantage may be. | ||
A study done in 2008 on Genetic factors predisposing to homosexuality increasing mating success in heterosexuals, shows that psychologically masculine females and psychologically feminine men are (a) more likely to be gay but (b), when straight, have more opposite-sex partners. With statistical modelling of the twin data, the study shows that both these relationships are partly due to pleiotropic genetic influences common to each trait. They also find a trend for heterosexuals with a non-heterosexual twin to have more opposite-sex partners than do heterosexual twin pairs. Taken together, these results suggest that genes predisposing to homosexuality confer a mating advantage in heterosexuals,<ref>https://www.sciencedirect.com/science/article/abs/pii/S1090513808000688</ref> which helps explain the evolution and maintenance of homosexuality in the population. This study doubles as evidence for [[Determinism|genetic determinism]]. | A study done in 2008 on Genetic factors predisposing to homosexuality increasing mating success in heterosexuals, shows that psychologically masculine females and psychologically feminine men are (a) more likely to be gay but (b), when straight, have many more opposite-sex partners. With statistical modelling of the twin data, the study shows that both these relationships are partly due to pleiotropic genetic influences common to each trait. They also find a trend for heterosexuals with a non-heterosexual twin to have more opposite-sex partners than do heterosexual twin pairs. Taken together, these results suggest that genes predisposing to homosexuality confer a mating advantage in heterosexuals,<ref>https://www.sciencedirect.com/science/article/abs/pii/S1090513808000688</ref> which helps explain the evolution and maintenance of homosexuality in the population. This study doubles as evidence for [[Determinism|genetic determinism]]. | ||
=== Emotions === | === Emotions === | ||