I don't think so because there is no evolutionary pressure for these things. 2 genders is the best model for the continuation of life which is what drives evolution.
It's debatable whether we are still evolving, I'd imagine not or not in any major way simply because the whole survival of the fittest thing, which is what creates evolutionary pressure, no longer applies because of modern medicine and ethics which allow people to breed who back in the way would have died long before that was possible. Not saying that is a bad thing btw!
Christianity does have set in stone, quite literally #10commandments. But IMO it has little to say about the mechanics of how life developed. As I said I don't believe Genesis is intended to be read scientifically. Many Christians disagree with me but to me the evidence is pretty compelling for an old earth and some form of evolution.