God doesn't create garbage. Every gene, every organ, every little thing has a purpose.
Yes, I know. The point was they don't know or understand it.
Natural selection? Nah, rather God's Plan and Providence.
I don't think God planned on the Fall, and the selection was done naturally as a result, rather than a deliberate separation (well Babel, maybe it was the result of that, but the process was natural)
Venerable Anne Catherine is quoted as saying that black skin was the result of sin.
That could be ignorance ;) Skin colour means little. Would albino "black" people be sinless?
Yes. But our genes cannot be completely isolated as we are all the same exactly nature. Africans had and have all the same genes that Europeans had and have. The bio-density of every physical nature is in every kind's DNA (seed and sperm). The difference is just how or which the genes are expressed. I believe every gene is something like a dualism, like yes or no, on or off. Whether this involves one, two, or more genes, I do not know.
Yes, the genetic code is very complex and mostly unknown. It is possible to remove certain things from the code in certain organisms though.
Like a male can not carry an X linked trait without expressing it, whereas females can, so males that don't have that trait, don't have it in them at all.
Well in a sense, yes, the genes evolved (changed) to express some new characteristic which once never was, though no new genes were created nor were any lost.
Yes, basically, using the legos to make new shapes, using the same old legos.