[JohnMK]

Quote by: The Bacon Guy But do you believe that homosexuality is purely genetic? Is it not, like most other personality and behavioral traits, likely to be a mix of genetic and environmental factors? If so, would it really ever be feasible to eliminate the possibility of homosexuality through genetics?

Stalking the Wild Taboo - Homosexuality

It might be noted that the interest in the evolutionary survival of homosexuality is independent of whether specific genes linked to homosexuality exist. There is evidence for such genes (Hamer et al. 1993, Hamer & Copeland, 1994, Hu et al. 1995). However, even if none of the variability in sexual orientation was genetic, there would still be the interesting question of how did humans come to be genetically constituted so that a relatively large proportion (say 2%) were homosexual. Thus, to ask the question of why there are so many homosexuals does not require accepting that there is a "homosexual gene". Suppose an "environmental" explanation for homosexuality (such as the stress hypothesis) comes to be accepted. There will still be the evolutionary question of how did humans evolve so as to have a genotype in which environmental factors could cause certain individuals to have a phenotype so poorly adapted to continuing the genotype as homosexuals are.