Genetic cause of homosexuality?

Female Homosexual Symbol Clip Art

By Spencer D Gear

Homosexuality is “not some kind of insidious disease” [1] according to an anonymous letter writer to the Fraser Coast Chronicle (Name & address supplied to the editor). Instead, homosexuality “is a genetic inheritance handed down from the parents’ gene pool. Both mother and father may or may not contribute however in balance, it favours the mother’s side of the gene distribution”, says the writer who does not want to be identified publicly.

Part of the following is in my letter to the editor, sent 11 December 2010, to the Fraser Coast Chronicle. This letter was not published.

This genetic argument to support homosexuality was expected. To those who oppose homosexual marriage, this writer in the FCC states that homosexuality is caused by the “gene pool”. In other words, we are born this way. What is the inference if the cause is our genetic heredity? Is homosexuality therefore to be treated like Down Syndrome? The implication is that it cannot be changed. This letter writer did not quote any authority or research to support his/her views.

But for those who oppose this genetic cause (people like myself)[2], this writer lambasted us as “narrow-minded experts” and “slanderers” who are depriving homosexuals of “democratic rights and freedom of belief that the Christian God loves them”.

Name-calling is detrimental to a healthy discussion about any subject and especially a controversial one such as homosexuality.

When he was asked if homosexuality was rooted solely in biology (e.g., genetic inheritance), gay gene researcher, Dean Hamer, replied,

“Absolutely not. From twin studies, we already know that half or more of the variability in sexual orientation is not inherited. Our studies try to pinpoint the genetic factors … not negate the psychosocial factors”.[3]

In addition, a gay neuroscientist, promoter of gay rights and whose gay partner died of HIV, Simon LeVay, has acknowledged that there are multiple factors that may contribute to a homosexual orientation.[4]

LeVay told Discover Magazine, “I did not prove that homosexuality is genetic, or find a genetic cause for being gay. I didn’t show that gay men are born that way, the most common mistake people make in interpreting my work”.[5]

A study published in 2006 by Anthony F. Bogaert[6], Brock University, Canada, has been promoted worldwide as evidence of a biological basis of homosexuality in young men with older brothers. Bogaert’s research has been reviewed and some have found significant flaws in it.[7] Dr. Neil Whitehead, a NZ research scientist, found that one of Bogaert’s broad statistics could easily hide crucial confounding data.[8]

A recent study reported in the UK’s Guardian newspaper (2008) stated that US researchers found a growing consensus that sexual orientation is an inborn combination of genetic and environmental factors.[9]

Therefore, it is inaccurate and misleading for the FCC letter writer to place exclusive emphasis on genetic inheritance of homosexuality received from the parents’ genetic pool.

I agree that the Christian God loves everyone, but all behaviour has eternal consequences.

For your research:

There’s a range of articles dealing with the genetic or other causes of homosexuality on the NARTH website.


[1] Fraser Coast Chronicle letters, “Sexuality is in the gene pool”, Name and address supplied but not printed, 10 December 2010, p. 20. The Fraser Coast incorporates Maryborough, Hervey Bay and Fraser Island in south-central Queensland, Australia.

[2] I have incorporated a letter-to-the-editor that I had published in the Fraser Coast Chronicle, 8 December 2010, “Heterosexual marriage has sustained societies” into this article, “Governments may promote gay marriage. Should we as evangelical Christians?

[3] Cited in Julie Harren 2008, “Homosexuality 101”, available from NARTH (National Association for Research & Therapy of Homosexuality) at: (Accessed 11 December 2010).

[4] Ibid.

[5] Cited in A Dean Byrd, Shirley E Cox, & Jeffrey W Robinson 2001. “The innate-immutable argument finds no basis in science”, available from NARTH, (Accessed 11 December 2010).

[6] Details from, “Do mothers create gay sons in the womb?”, available from NARTH at: (Accessed 11 December 2010).

[7] See “Canadian psychiatrist finds major flaws in Anthony Bogaert’s study of gay brothers”, available from NARTH at: (Accessed 11 December 2010).

[8] In ibid.

[9] “US researchers find evidence that homosexuality linked to genetics”, The Guardian [UK], 1 December 2008. Available at: (Accessed 11 December 2010).


Copyright © 2010 Spencer D. Gear. This document last updated at Date: 1 September 2018.