You didn't ask. I'll take your meaningless conjecture as a request, then. Unlike you, I don't "believe" things. I accept things that are actually true. And yes, we are animals. Your arrogance to the point of self-delusion is stunning. But I don't need to talk about
other animals. Plenty of proof within our own species.
Not necessarily genetics. At least, not of the child. I'm going to ignore your scary comment about mothers aborting gay fetuses. But either way, I doubt these traits would show up in a fetus.
This article is a great catch-all to all of the various physical traits we have identified as being common in gay people. Links are in the article, take you to a variety of studies.
Homosexuality in body, brain and behaviour « Mind Hacks
The suspected cause of homosexuality - certain types of hormonal exposure at gestation:
Male hormone levels in womb may affect sexual orientation, study says - CNN
...Which also just so happens to explain some of the physical traits.
If it affects your bone structure, it's not a choice.