http://www.washingtonpost.com/posteverything/wp/2014/06/04/the-science-of-sexuality-how-our-genes-make-us-gay-or-straight/?tid=sm_fbGay men were divided: The finding vindicated the oft-repeated claims that I was born this way but also opened frightening new possibilities for detection and discrimination.
Similar studies gave contradictory results. A later search found associations with genes on three other chromosomes.
This year, a larger study of gay brothers, using the many genetic markers now available through the Human Genome Project, confirmed the original finding and also detected another gay gene on chromosome 8. This has unleashed a new flurry of comment.
But why such a furor when we know of gay gene variants in species from flies to mammals? Homosexuality is quite common throughout the animal kingdom. For instance, there are variants that influence mating preference in mice, and a mutation in the fruit fly makes males court other males instead of females.
pretty interesting, would you want to find out if your son/daughter was going to be born with the gene?