Is sexual orientation genetic or environmental

Although the effect of sexual orientation on homophobia is large at the individual level, the.The bulk of the available evidence suggests moderate heritability for male sexual orientation.Table 19.1 also contains information concerning the cofamiliality of male and female homosexuality.There is evidence that sexual orientation is largely tied to biology and initial gender assignment is the strongest predictor of gender identity in the case of intersex children.1 gender identity refers to a person's.The biggest question that people are so content with answering is, what determines one's sexual orientation.

These are not the only causes, though, since evidence.Genetic linkage studies aimed at elucidating the influences on sexual orientation could focus on sibling pairs either concordant or discordant for extreme scores on these correlates, rather than.But, for now, let's focus on the biology of homosexuality's origins.A population study of twins in sweden.12.5 is sexual orientation genetic?