Is Being Gay Hereditary/Genetic?

[chesspain]

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Is being Gay a genetic trait?

All gay persons parents, grandparents and thier entire ancestral lineage engaged in heterosexual sex. How could being gay be a genetic trait?

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Being "genetic" is not the same as being hereditary. The latter means that you specifically received something from or through one or both of your parents. The former simply implies that it is something that you were born with--and "genetic" is probably not even the right term, because it implies that whatever we are speaking about is due to your specific genetic coding.

My understanding is that sexual preference is set at a very early age, possibly even by the time of birth. However, a lot happens from the moment of fertilization through the time a child is three or four years old.

I think the best way to summarize this is to say that for most gay people their sexual preference isn't really a choice.