You don't need to find the gene. It can be cured *now* through godly therapy.
The whole issue of homosexual deviancy is really a pagan practice (and a self induced social psychosis) at war with the Judaic culture over what is written in the book of Genesis (1:27, 2:18).
Many will seek ceremonious sanctification and esoteric absolution in some type of marriage rite, but that still fails to give them a connection to the eternal in both a religious and temporal, procreant sense - - the union does not produce offspring...
Dissatisfaction with inevitable mortality only feeds the impoverishment of the ego further. Homosexuals really hate human life, their whole desire is rooted in the destruction of it...
"And such were some of you..."