Researchers report up to 25% of same-sex behaviors are associated with genetic variants. The study identified five new genes associated with sexual behavior. They report there is no one single gene linked to same-sex sexual behavior or orientation, but numerous genes, as well as other factors which contribute. Researchers emphasize the markers may be unreliable in predicting same-sex behavior but may influence the likelihood for specific relationship choices.
Study reveals sexual orientation develops over a longer duration than previously believed. The findings suggest sexual orientation can develop into the late 20s.
Researchers at UCLA embark in new studies into the biological origin of gender identity and sexual orientation.