Two gene variants have been found to be more common in gay men. 28, 2005 - the genes a man gets from his mother and father may play an important role in determining whether he is gay or not, according to a new study likely to reignite the gay gene debate. A number of twin studies have attempted to compare the relative importance of genetics and environment in the determination of sexual orientation. In a 1991 study, bailey and pillard conducted a study of male twins recruited from homophile publications, and found that 52 of monozygotic (mz) brothers (of whom 59 were questioned) and 22 of the dizygotic (dz) twins were concordantfor homosexuality. is being gay genetic? Can you get rid of homosexuality? Https. Examined 114 families of gay men in the united states and found increased rates of homosexuality among maternal uncles and cousins, but not among paternal relatives. This pattern of inheritance suggested that there might be linked genes on the x chromosome, since males always inherit their copy of the x chromosome from their mothers. Scientists quash idea of single gay gene this article is more than 8 months old. Many genetic variants each play role in homosexual behaviour, study finds. genes linked to being gay may help straight people get more sex. The largest-ever study of genetics and sexual orientation offers a theory about the longevity of genes that influence homosexuality. The molecular biologist offered the first direct evidence of a gay gene, by identifying a stretch on the x. the life of the gay gene from hypothetical genetic marker to social reality. Author information (1)department of media, film, and music, university of sussex, falmer bn19rg, england. Uk the gay gene was first identified in 1993 as a correlation between the genetic marker xq28 and gay male sexuality. no gay gene massive study homes in on genetic basis of human sexuality nearly half a million genomes reveal five dna markers associated with sexual behaviour .