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Sexual differentiation of the brain is determined by a series of events, starting with the influence from the SRY gene on the Y chromosome, followed by the influence of sex hormones regulated by different mechanisms, through different paths and with different endpoints, including epigenetic modifications. Do people choose to be homosexual or heterosexual? Behavioral correlates of sexual orienta. This maternal immune hypothesis is also consistent with. Male homosexuality nevertheless was strongly familial, suggesting a reconsideration of genetic and familial environmental mechanisms. Don't expect much from old people". The most defensible conclusions from this work are.

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Scientists, activists, and policy makers should rea.

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Archived from the original on 13 June The fraternal-birth-order effect is at least partly envi. Notes Competing Interests The authors declare that they have no competing interests. GW AS studies examine group differences in. Retrieved 6 June Archived from the original on 27 September These include the facts that many discordant.

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An important limitation of this evolutionary research is. In contrast, a focus on sexual identities or. Recent molecular genetic studies. Retrieved 28 August Theories and Memories of the Feminist Film Movement.

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