Retrieved June 12,
Biology and sexual orientation
Biometric modeling revealed that, in men, genetic effects explained. She is not associated with any organisation that would benefit from this article. A study, Garcia-Falgueras and Swaab asserted that "the fetal brain develops during the intrauterine period in the male direction through a direct action of testosterone on the developing nerve cells, or in the female direction through the absence of this hormone surge. The hypothesis is consistent with other studies on homosexuality, which show that it is more prevalent amongst both siblings and twins. Implications for the Kin Selection Hypothesis".
The previous research also indicated that grave disease had been seen more in gay men than in straight men. This result LeVay concluded, "suggests that sexual orientation has a biological substrate". Bem sought support from published literature but did not present new data testing his theory. Three gene finding studies showed that gay brothers share genetic markers on the X chromosome; the most recent study also found shared markers on chromosome 8. But this is an absurd way to look at desire.