Description: Currently you are watching Group selection homosexuality statistics porn video. You can find more videos like Group selection homosexuality statistics below in the related videos section. The relationship between biology and sexual orientation is a subject of research. While scientists do not know the exact cause of sexual orientation , they theorize that a combination of genetic, hormonal, and social factors determine it. Biological theories for explaining the causes of sexual orientation are favored by scientists  and involve a complex interplay of genetic factors, the early uterine environment and brain structure. "How can a trait like male homosexuality, which has a genetic The allele - or group of genes - that sometimes codes for homosexual orientation may at other in Samoa has focused on a theory called kin selection or the "helper in having a homosexual orientation boosts siblings' reproduction rate, but.
Added: 23.03.2019 at 15:37
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