The largest study of its kind to date estimates that genetics accounts for at most 8–25 percent of variation in whether or not a person reports engaging in non-heterosexual behaviors.
A genomic interrogation of homosexuality turns up speculative links between genetic elements and sexual orientation, but researchers say the study is too small to be significant.
Scientists who study the biological roots of sexual orientation should continue working with educators, policy-makers, and the public to put their data to good use.