that homosexuality is genetically passed on within the human race.”
Impossible since selection against reproduction of the species in a sexually dimorphic species would be certain to eliminate said queer gene(s). People who state otherwise simply know nothing about genetics.
What you are saying is that a homosexual gene could no longer exist.
We have, from "Darwin's Ghost" by Steve Jones, that ...
The first members of our own species, Homo sapiens, arose about a hundred thousand years ago as large, thick-skulled, but recognizable human apes.
We also have, today, innumeral living homosexuals, male and female.
Go figure.