Unformatted text preview: knowledge concerning the biology of sexual orientation during the past decade has been considerable. Sexual orientation is characterized by a bipolar distribution and is related to fraternal birth order in males. In females, its distribution is more variable; females being less prone towards exclusive homosexuality. In both sexes homosexuality is strongly associated with childhood gender nonconformity. Genetic evidence suggests a heritable component and putative gene loci on the X chromosome. Homosexuality may have evolved to promote same sex affiliation through a conserved neurodevelopment mechanism. Recent findings suggest this mechanism involves a typical neurohormonal differentiation of the brain. Key areas for future research include the neurobiological basis of preferred sexual targets and correlates of female homosexuality....
View Full Document
- Spring '11
- Human Sexuality, Sexual intercourse, Biology of Sexual orientation