Biol Psychol. 2008 Jan;77(1):102-5. Epub 2007 Aug 30.

Potential for homosexual response is prevalent and genetic.

Santtila P, Sandnabba NK, Harlaar N, Varjonen M, Alanko K, von der Pahlen B.

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Center of Excellence in Behavior Genetics, Department of Psychology, Abo Akademi University, 20500 Turku, Finland. pekka.santtila@abo.fi

Abstract

We investigated the potential to engage in homosexual behavior in 6001 female and 3152 male twins and their siblings finding that 32.8% of the men and 65.4% of the women reported such potential (p<0.001). 91.5% of these men and 98.3% of these women reported no overt homosexual behavior during the preceding 12 months. The potential to engage in homosexual behavior was influenced by genetic effects for both men (37.4%) and women (46.4%) and these overlapped only partly with those for overt homosexual behavior.

PMID:: 17904267; [PubMed - indexed for MEDLINE]

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