Well, if that one study shows it so, I guess all other studies are invalid. Not only that, but I guess it explains how someone who was a homosexual, and is no longer, lost these genes.
"A study done in 1995 by a certain Dean Hamer of the U.S. National Institute of Health purported to find a homosexual gene. Hamer claimed that this “homosexual gene” was responsible for a person’s sexual orientation. His study at the time was criticized within the scientific community for containing numerous flaws. In addition, the fact that Dr. Hamer himself was a practicing and an activist homosexual caused many to wonder about the objectivity of his research. At the time, he bragged about the ease with which a person could manipulate the press…
However, since then another study has been done by Dr. Alan Sanders, also from the National Institute of Health. He replicated Hamer’s study in order to verify his conclusions, and Dr. Sanders found no evidence to validate Hamer’s findings or his theory. The study by Dr. Sanders did not reproduce Hamer’s results. It’s a well-known scientific law that a finding must be replicated by other researchers before it can be considered valid. And on this one, Hamer’s claim was not replicated.
… another study at the University of Western Ontario by neurologist Dr. George Rice…tried to reproduce Hamer’s study and researched homosexual brothers from 48 families. He found that they were no more likely to share similar genetic patterns than would have been the odds from pure chance.
These two recent scientific reports have proven that homosexuality is not caused by genetics and that the 1995 study by Dean Hamer was skewed due to his biased research.
Or there’s this:
http://dunamai.com/articles/general/is_homosexuality_genetic.htm