Homosexual behavior due to genetics and environmental factors | Eureka! Science News

Homosexual behavior due to genetics and environmental factors | Eureka! Science News: "Homosexual behaviour is largely shaped by genetics and random environmental factors, according to findings from the world's largest study of twins. Writing in the scientific journal Archives of Sexual Behavior, researchers from Queen Mary's School of Biological and Chemical Sciences, and Karolinska Institutet in Stockholm report that genetics and environmental factors (which are specific to an individual, and may include biological processes such as different hormone exposure in the womb), are important determinants of homosexual behaviour."