Homosexual orientation in twins: A report on 61 pairs and three triplet sets |
| |
Authors: | Frederick L. Whitam Ph.D. Milton Diamond Ph.D. James Martin B.A. |
| |
Affiliation: | (1) Department of Sociology, Arizona State University, 85287-2101 Tempe, Arizona, USA;(2) Department of Anatomy and Reproductive Biology, John A. Burns School of Medicine, University of Hawaii, 1951 East-West Road, 96822 Honolulu, Hawaii, USA |
| |
Abstract: | Twin pairs in which at least one twin is homosexual were solicited through announcements in the gay press and personal referrals from 1980 to the present. An 18-page questionnaire on the sexuality of twins was filled out by one or both twins. Thirty-eight pairs of monozygotic twins (34 male pairs and 4 female pairs) were found to have a concordance rate of 65.8% for homosexual orientation. Twenty-three pairs of dizygotic twins were found to have a concordance rate of 30.4% for homosexual orientation. In addition, three sets of triplets were obtained. Two sets contained a pair of monozygotic twins concordant for sexual orientation with the third triplet dizygotic and discordant for homosexual orientation. A third triplet set was monozygotic with all three concordant for homosexual orientation. These findings are interpreted as supporting the argument for a biological basis in sexual orientation. |
| |
Keywords: | homosexuality twins triplets sexual orientation genetics |
本文献已被 SpringerLink 等数据库收录! |
|