Is being gay heriditary

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X chromosome again linked to homosexuality. In this lesson, Maria Konnikova, author of Mastermind: Hofman reported a difference in the size of the suprachiasmatic nucleus between homosexual and heterosexual men. Psychol Bull. The hunt for sexual orientation genes—which wades into the polarizing question of whether people are born gay or become so—is part of a boom in genomics research that aims to unveil how genes shape behavior, not just diseases. Zanzotto Making Choices in a Diverse Society.

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The Atlantic Monthly.

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In the common fruit fly Drosophila melanogasterthe complete pathway of sexual differentiation of the brain and the behaviors it controls is well established in both males and females, providing a concise model of biologically controlled courtship. In a study, its authors stated that "There is considerable evidence that human sexual orientation is genetically influenced, so it is not known how homosexuality, which tends to lower reproductive success, is maintained in the population at a relatively high frequency. Simon LeVaytoo, conducted some of these early researches.

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Biological Factors in the Development of Sexual Orientation.

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