Research on genetics of same-sex behavior ignites ethical debate.

“Intellectually, what do we gain by finding out there’s a homosexual gene? Nothing, except an attempt to identify those people who have it and then open them up to all sorts of experimentation.” (Getty Images)

Are sexual preferences genetic?

According to a recent paper in Science, the answer is at least partially yes. By screening close to 500,000 DNA samples, researchers identified five locations in the genome that were significantly associated with same-sex sexual behaviour…