eagleseven
Quod Erat Demonstrandum
You are incorrectly assuming a simple Mendelian on/off gene structure, which is tested by twin studies.Linky?The genetic theory was disproved, the hard wire fallback is not a theory because it is not based in science.
Wait, I've got one:
Homosexuality Linked to Genetics in Mice - TIME NewsFeed
If you insist.
Male Homosexuality: Absence of Linkage to Microsatellite Markers at Xq28 -- Rice et al. 284 (5414): 665 -- Science
Use this one for the links to the studies at the end. If homosexuality was genetic then identical twins would always be both homosexual, or both straight. That alone disproves that it is genetic.
The Importance of Twin Studies
Even Wikipedia knows it is not genetic.
Biology and sexual orientation - Wikipedia, the free encyclopedia
I have dozens, how many do you want?
Sexuality is likely much like skin color, with many, many genes resulting in many phenotypes (which do not nicely fit into our societies "black" and "white" definitions).