Quote:
OH, and you can make an experiment say whatever you want. Who funded the lab that came up with those results? You don't know, neither do I. How can you assume that their findings are the truth?
And maybe they are... what if that is true and there is a true genetic link? Well hey, then good for them for finding it. Personally, I need more proof.
The link refers to a book which is based on this paper (by the same author):
Quote:
Biosocial factors, sexual orientation and neurocognitive functioning, Psychoneuroendocrinology, In Press, Corrected Proof, Available online 18 November 2003,
Qazi Rahman, Glenn D. Wilson and Sharon Abrahams
Born gay? The psychobiology of human sexual orientation, Personality and Individual Differences, Volume 34, Issue 8, June 2003, Pages 1337-1382
Qazi Rahman and Glenn D. Wilson
Sex differences in the hypothalamus in the different stages of human life*1, Neurobiology of Aging, Volume 24, Supplement 1, May-June 2003, Pages S1-S16
Dick F. Swaab, Wilson C. J. Chung, Frank P. M. Kruijver, Michel A. Hofman and Andon Hestiantoro
The Interstitial Nuclei of the Human Anterior Hypothalamus: An Investigation of Variation with Sex, Sexual Orientation, and HIV Status, Hormones and Behavior, Volume 40, Issue 2, September 2001, Pages 86-92
William Byne, Stuart Tobet, Linda A. Mattiace, Mitchell S. Lasco, Eileen Kemether, Mark A. Edgar, Susan Morgello, Monte S. Buchsbaum and Liesl B. Jones
Fraternal Birth Order and the Maternal Immune Hypothesis of Male Homosexuality, Hormones and Behavior, Volume 40, Issue 2, September 2001, Pages 105-114
Ray Blanchard
Sexual Orientation and Handedness in Men and Women: A Meta-Analysis*1, Psychological Bulletin, Volume 126, Issue 4, July 2000, Pages 575-592
Martin L. Lalumière, Ray Blanchard and Kenneth J. Zucker
Taxometric Analyses of Sexual Orientation and Gender Identity*1, Journal of Personality and Social Psychology, Volume 78, Issue 6, June 2000, Pages 1109-1121
Steven W. Gangestad, J. Michael Bailey and Nicholas G. Martin
Genetic and Environmental Influences on Sexual Orientation and Its Correlates in an Australian Twin Sample*1, Journal of Personality and Social Psychology, Volume 78, Issue 3, March 2000, Pages 524-536
J. Michael Bailey, Michael P. Dunne and Nicholas G. Martin
etc etc.
I've flipped through about 20 of these and of the papers that actually follow similar grounds and examine the likelyhood of a genetic basis, none of them disagree with it's findings.
Quote:
Born gay? The psychobiology of human sexual orientation
Qazi Rahman, and Glenn D. Wilson
Department of Psychology, Institute of Psychiatry, University of London, De Crespigny Park, London SE5 8AF, UK
Received 26 November 2001; revised 1 April 2002; accepted 27 April 2002. ; Available online 9 June 2002.
Abstract
Sexual orientation is fundamental to evolution and shifts from the species-typical pattern of heterosexuality may represent biological variations. The growth of scientific knowledge concerning the biology of sexual orientation during the past decade has been considerable. Sexual orientation is characterised 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 neurodevelopmental mechanism. Recent findings suggest this mechanism involves atypical neurohormonal differentiation of the brain. Key areas for future research include the neurobiological basis of preferred sexual targets and correlates of female homosexuality.
Personality Processes and Individual Differences
Genetic and Environmental Influences on Sexual Orientation and Its Correlates in an Australian Twin Sample*1
J. Michael Bailey, , a, Michael P. Dunneb and Nicholas G. Martinc, d
a Department of Psychology, Northwestern University, USA
b School of Public Health, Queensland University of Technology, Brisbane, Queensland, Australia
c Epidemiology Unit, Queensland Institute of Medical Research, Brisbane, Queensland, Australia
d Joint Genetics Program, University of Queensland, Brisbane, Queensland, Australia
Received 7 January 1998; revised 22 July 1999; accepted 30 July 1999. Available online 13 August 2002.
Abstract
We recruited twins systematically from the Australian Twin Registry and assessed their sexual orientation and 2 related traits: childhood gender nonconformity and continuous gender identity. Men and women differed in their distributions of sexual orientation, with women more likely to have slight-to-moderate degrees of homosexual attraction, and men more likely to have high degrees of homosexual attraction. Twin concordances for nonheterosexual orientation were lower than in prior studies. Univariate analyses showed that familial factors were important for all traits, but were less successful in distinguishing genetic from shared environmental influences. Only childhood gender nonconformity was significantly heritable for both men and women. Multivariate analyses suggested that the causal architecture differed between men and women, and, for women, provided significant evidence for the importance of genetic factors to the traits' covariation.