Evidence for epigenetic influences on sexual orientation comes from a recent study showing that ______ in five DNA regions is 70% accurate in predicting which of a twin pair identifies as homosexual.

Question

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The correct answer is methylation. Methylation is an epigenetic mechanism that involves the addition of a methyl group to DNA, thereby affecting gene expression without changing the DNA sequence itself. This process has been linked to various biological and physiological processes, including the development of sexual orientation. The study mentioned refers to findings that differences in DNA methylation patterns in specific regions can predict sexual orientation with a significant degree of accuracy.

Evidence for Epigenetic Influences on Sexual Orientation Comes from a Recent