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[–]Shales123[S] 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (2 children)

Exactly my thoughts

[–]HelloMomo 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

To me it seems plausible that bi is the one-allele, heterozygous version, and full-on homosexuality is the two-allele, homozygous version.

[–]reluctant_commenter 3 insightful - 1 fun3 insightful - 0 fun4 insightful - 1 fun -  (0 children)

Well... I think that might be an oversimplification, right? AFAIK there is a strong genetic basis for sexual orientation, but not one single gene for sexual orientation, per se.