In research on the causes of homosexuality, scientists have begun to focus on the study of how genes are expressed during development, which is called

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Epigenetics is the study of how genes are expressed during development, including changes in gene expression that do not involve alterations to the DNA sequence itself. This field is relevant to understanding complex traits like sexuality, where gene expression can be influenced by a variety of environmental and developmental factors.

In Research on the Causes of Homosexuality, Scientists Have Begun