Why do dark-skinned people stay dark after migrating to low-sun regions, and does skin color have its own DNA code?
Robert Sungenis answers that human DNA is built to adapt to its environment, which is adaptation within one species rather than evolution. He holds that Noah's family carried a large gene pool from Adam and Eve, and that people near the equator developed more melanin to protect against ultraviolet light while people in the far north needed less, though he says he is reasoning logically rather than as an expert.
A viewer asks how dark-skinned people tend to remain dark even after generations in lower-sun locations, and fair-skinned people retain fair skin in high-sun areas, and whether skin color has some DNA code of its own.
Answer
It is not easy, and I do not pretend to be the expert on this; I just use logic. Once people got into a certain place after the flood, I think it is obvious that our DNA structure is built for adaptation, and that is the marvel of DNA: it can vary depending on the environment. This is adaptation, not evolution, because adaptation is the same species adapting to a different environment, whereas evolution claims one species develops into a higher species by time and chance, which is yet to be proven. Noah and his family carried a very large gene pool from Adam and Eve, and that pool only gets bigger down the generations, so you can carry a gene from a great-grandfather that your father does not seem to have. So people near the equator get more solar exposure, and the DNA reacts by producing more melanin, which is in one of the lower of the skin's seven layers and comes to the surface with more sunlight to protect against ultraviolet light and cancer. People in the north, in Sweden, Finland, Russia, Canada, get much less sun, so their skin does not need as much melanin and stays light. How every detail works out I cannot say, and the theories out there are all tainted by evolution, but the general answer is our God-given DNA structure adapting to the environment, along with the flood and its aftermath dispersing people and animals across the separating continental masses.