Homosexuals who are Twins

Author:

King Michael,McDonald Elizabeth

Abstract

Forty-six homosexual men and women who were twins took part in a study of their sexuality and that of their co-twin. Discordance for sexual orientation in the monozygotic pairs confirmed that genetic factors are insufficient explanation of the development of sexual orientation. There was a high level of shared knowledge of sexual orientation between members of twin pairs, and a relatively high likelihood of sexual relations occurring with same sex co-twins at some time, particularly in monozygotic pairs. The implications of these results for the study of the origins of sexual orientation and for twin research are discussed.

Publisher

Royal College of Psychiatrists

Subject

Psychiatry and Mental health

Reference10 articles.

1. Homosexuality in Monozygotic Twins Reared Apart

2. Comparative twin study of the genetic aspects of male homosexuality;Kallman;Journal of Nervous and Mental Disease,1952

3. The Study of Human Twins in Medical Research

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