This was popularly dubbed the " gay gene " in the media, causing significant controversy. The latest findings open the prospect to identifying the whole pathway of genes involved in both homosexual and heterosexual orientation, says Dean Hamer at the US National Institutes of Health, who led the study that pinpointed chromosome X back in Sanders et al. LGBT culture. J Pers Soc Psychol. Animal Homosexuality:
The results are consistent with previous studies suggesting genetics may play a bigger role in influencing male sexuality than female sexuality.
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The result also indicates that number of pregnancies, mothers of gay sons, particularly those with older brothers, had significantly higher anti-NLGN4Y levels than did the control samples of women, including mothers of heterosexual sons.