Is being gay genetic and, if so, do we all have a gay gene?
同性恋是遗传的吗?如果是,那我们都有同性恋基因吗?
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Ultimately, a specific gay gene has not been found, but scientific evidence does suggest that human sexual orientation is strongly linked to genetics and tightly regulated at the molecular level.
Well, a recent UCLA study used epigenetics to propose that everyone has a gay gene, but it's whether or not the attachment of a methyl group to specific regions of DNA is triggered and turns it on.