The monozygotic twin studies for male homosexuality done so far indicate there is a weekly heritable component, but it cannot be determinative since many identical twins do not share homosexuaal preferences.
So for females, we are not going to find any gene. For males, we might find one (or more) genes causing predisposition. Are parents going to abort their children on the basis of a possible disposition? Well, some states have left them with no choice, since they will not be permitted to administer any type of cognitive or behavioral therapy once the child is born.
In light of the evidence we have so far, that homosexuality is mostly a learned behavior (entirely learned in the case of lesbians) here is a far more important question: eventually someone (probably in Russia, China, or another advanced society where homosexuality is still considered undesirable) is going to develop a pharmacological solution to male homosexual predisposition. Will American parents be allowed to give their child that chemical, or not?
So far, the evidence is pretty strong that they will not.
• Chinese researchers found blocking serotonin in female mice caused them to prefer sniffing and mounting females
• Researchers believe the chemical could be part of 'chemical chain' that determines our sexual preference
Probably a stereotype but Lesbians never seem to like men. They even seem to “hate” men. I have known a couple of lesbian couples and they always seem to avoid me. My wife, no. And I am always friendly. Rose O’Donnell doesn't like men. She even had a bad relationship with her father.
Surprised that this has never been considered.