The answer is immune system
Human evolution known to be a process in which species adapt to certain conditions of life, and in the battle of life and death, they are forced to become stronger in order to survive in the world. Diseases have always been present during the evolution, acting themselves as a natural selector-the weaker organisms get sick and die.
just carbohydrates my guy
Answer: I predict that if they follow a dominant/recessive inheritance pattern, they will most likely be red.
Hope this helps!! :D