No single 'gay gene' but a complex mix of genetics affects behavior: Study

Sexual rights campaigners welcomed the study, saying it 'provides more evidence that being gay or lesbian is a natural part of human life'

A large scientific study into the biological basis of sexual behaviour has confirmed there is no single “gay gene” but that a complex mix of genetics and environment affects whether a person has same-sex sexual partners.
 
The research, which analysed data on DNA and sexual experiences from almost half a million people, found there are thousands of genetic variants linked to same-sex sexual behaviour, most with very small effects.
 
Five of the genetic markers were “significantly” associated with same-sex behaviour, the researchers said, but even these are far from being predictive of a person’s sexual preferences.
 
“We