A popular misconception about genetics is that certain behaviors or
traits boil down to singular genes and alleles. This is due in part to
the structure of early genetic experiments focused on simple organisms
(like Gregor Mendel’s famous pea plants) where changes over generations
could be easily observed. The simplicity of these experiments made them
valuable teaching aids in science education, but
geneticists
are increasingly discovering the subtle effects of seemingly unrelated
genes that combine to determine a result once thought to be down to just
one or two chromosomes.
With that in mind, that even though the human genome has been successfully mapped not finding a *gay* gene doesn't mean there isn't a combination of these singular genes that does.
There are millions of possible combinations, and those effects have not been calculated.
Just so ya know, they didn't find a straight gene either.
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