It they could isolate a gene that determines what or who we're attracted to then pedophiles could have been cured by now .
2 There is not a gene for that. But did you know that we are all female when first conceived? And as we grow a change takes place and then some change to males.It a slight few this change has problems and once in awhile one is born with both sexes.
3 I don't think there is a gay "gene. " But, It is common in a family where the parent is gay, and raises the child, sometimes the child will believe that it is the way they should be, so they be that way, just like with straight people.
The research on a genetic basis for homosexuality is muddied by the fact that the findings can be explained as "proof" of a homosexual tendency in some OR explained as "proof" of damaging genetic mutations that contribute to extinction of the species (thru non-reproducing members) or "proof" of some other, unknown and unresearched, survival mechanism. My point is that alternative explanations are not considered so they are not investigated. That's bad science, tho.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.