So, what is your understanding?
My understanding is that genes are discrete bundles of information rather than substances that can be blended and mixed together as a medium.
As usual, we have to explain while you call us ignorant. We just don't believe the way you do so we're ignorant, right?
Who is the "us"? Who is the "you"? I stand with those who have actually taken time to study the sciences. That includes educated Christians. Contrary to your earlier comment, Christians do not become stupid just because they've gained more of an education than what's posted on creationist blogs.
As for who has to explain what, you get to make stuff up and explain it, which is easy because you've made it up. Whereas I, or others who have worked for an education, actually have to recall material about the real world in order to explain it to you. The latter takes genuine effort, and those who ignorantly make stuff up and peddle it to the masses have a logistical advantage over those who attempt to spread knowledge. The former requires less energy, and accepting ignorance - or just believing a bible - requires less thought.
That energy difference is expressed here in the fatigue others have with trying to correct your own random bullshit.
So, from an evolutionary standpoint, how come we have different skin and eye colors?
This is surely not the whole story, but most basically, because those with certain skin or eye colours had more children than others with different skin and eye colours. There was never a small enough breeding population that only one or two sets of relevant genes existed, so selection had something to work with. A population inherits the diversity of its ancestors plus whatever random changes occur due to mutation or copying errors, and minus whatever unique genes were in any individuals that didn't manage to breed.
Didn't Darwin explain survival of the fittest well enough?
He didn't explain survival of the fittest at all. That's not even a phrase he used. You have been misinformed at best, or you have been lied to, or at worst, you know better and are lying now.
So all are fit. I guess benevolence evolved along with the weaker white race.
This stems from nothing I have said. What caused you to type it?