How is then that, in every instance of research done to date, the correlation of same-sex attraction among identical twins never exceeds 11 percent?
If homosexuality were a genetic trait, then both individuals in a set of identical twins would possess the inclination to the same degree and without exception - since they share the same DNA. Yet that is hardly the case, even in the most biased research.
The point is not all born problems are “genetic”, as ininherited traits. Many are accidental mutations, or defective gametes themselves.
My post was not intended as support for the existence of a homosexual gene. I do not know if one exists or not. My post was intended to point out the flaw in the reasoning committed by the author. That line of reasoning would apply to other genetic defects that inhibited reproduction. Since other such genetic defects are well documented, and less controversial, it is clear that the premise of the article is false.
Not purely genetic. I have known a lot of birth defects that identical twins do not share, such as epilepsy, autism(different severity), etc. a lot of birth defects are far from 100 percent genetic. Often the cause is mixed.