It's actually a rare occurence when a trait is determined by only one gene. Given that sexuality is highly complex, it seems very unlikely that there is a gay gene. I haven't really looked into the science, though.
The most likely scenario, I think, is that sexuality is like most of our neurological traits and is affected by both genetics and environment.
The most likely scenario, I think, is that sexuality is like most of our neurological traits and is affected by both genetics and environment.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell