409 Pairs of Twins Give Strongest Indication that People Are Born Gay

A genetic analysis of 409 pairs of gay twins has provided the strongest evidence yet that gay people are born gay. The study clearly links sexual orientation in men with two regions of the human genome that have been implicated before, one on the X chromosome and one on chromosome 8.

http://www.newscientist.com/article/dn26572-study-of-hundreds-of-male-twins-zeroes-in-on-gay-genes.html#.VGq1vVfF-2A