Study of Gay Brothers Suggests Genetic Basis of Male Homosexuality

Are people born gay or is it a choice? A new study of gay brothers, the largest to date, adds more scientific evidence that there's a genetic basis for homosexuality. A genetic analysis of over 409 pairs of gay brothers found that two areas of the human genome, a portion of the X chromosome and a portion of chromosome 8, were associated with the men's sexual orientation. The findings gel with a smaller study conducted in 1993 that implicated the same area of the X chromosome. Zeroing In