(September 9, 2013 at 10:57 pm)ChadWooters Wrote:(September 8, 2013 at 10:34 pm)Maelstrom Wrote: I am gay.So if homosexuality is genetic, why hasn't it been breed out of existence by now?The only breeding I do is with other men, and thankfully we cannot become pregnant.
Its actually not an insane question. There are a number of probable causes of homosexuality, one of which, for example, is not genetic.
It appears that in families which have 4 or more sons the probability that the last son will be homosexual is much higher than the norm for the general population. It is speculated that it might be caused by the mother producing something akin to anti-testosterone as a kind of immune system reaction.
There may also be a genetic element which probably resides on the x-chromosome and affects the androgenisation of the brain. This would explain why it cannot be "bred out" as it would be passed on through the mother (the father cannot pass his x chromosome on to his son).
