The Gay Gene
Andrea Camperio-Ciani, an evolutionary psychologist at the University of Padova believes her team has found the «gay gene» in men (but not women). The evolutionary process is called, «sexually antagonistic selection».
If this scenario turns out to be true, it could help explain the seeming paradox of hereditary homosexuality. Since gay people are less likely to reproduce than heterosexuals, many experts have wondered why, if homosexuality is caused by genetic factors, it wouldn't have been eliminated from the gene pool already.
But if the same genes create both homosexuality in men and increased fertility in women, then any losses in offspring that come about from the males would be made up for by the females of the family.
«Sexually antagonistic selection is an old idea by Richard Dawkins, but this has never been proven in humans,» Camperio-Ciani told LiveScience. «There are a large quantity of these traits found in insects, for example, and recently in deer sexually antagonistic traits have been discovered, showing that high-ranking males produce rather unsuccessful daughters. We found that sexually antagonistic selection is operating also in our species, and we found it in a very important trait, which is homosexuality.»
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The research may shed light on a complicated and controversial topic: whether homosexuality is a choice, or whether it is caused by factors beyond a person's control.
«I think this is an example where the results of scientific research can have important social implications,» Camperio-Ciani said. «You have all this antagonism against homosexuality because they say it's against nature because it doesn't lead to reproduction. We found out this is not true because homosexuality is just one of the consequences of strategies for making females more fecund.»
The compelling aspect of this hypothesis is, that it fits within the evolutionary paradigm-a predicament which could very well utterly discredit science for many male «only child» heterosexuals.
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