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Stormshak March Women showed a statistically non-significant trend to weaker influence of hereditary effects, while men showed no effect of shared environmental effects. By Jocelyn Kaiser Jun. Some scholars [70] have suggested that homosexuality is indirectly adaptive, by conferring a reproductive advantage in a non-obvious way on heterosexual siblings or their children. Instead, the researchers found genetic variants known as single nucleotide polymorphisms, or SNPs, located on four other chromosomes.

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Marriages, Families, and Relationships: The two regions of the genome with the most differences were near genes whose roles might be linked to sexual orientation. Hamilton and Mary Jane West-Eberhard.

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