3 Ways to Know if You Are Gay - wikiHow

"Understand a bit about what science says about being gay
. Studies seem to support a strong genetic component in sexual orientation. A hot area of research currently is in epigenetics, or the study of how non-genetic factors influence the expression of genes. Geneticists hypothesize that homosexuality is linked to "epi-marks," or extra layers of information that determine how genes are expressed.[4] Normally, epi-marks are deleted when genes get passed from parents to children. With homosexuals, scientists believe that epi-marks are not deleted, and instead passed on from either father to daughter or from mother to son.[4]