Its as plain as the nose on your face! We evolve plain and simple, in humans we call it sexual intercourse we have children! Now if you or the toxic environment has screwed him up he or she will take the best from each of his parents dominant genes and improve on the two parents ! If evolution didnt exist your children would look like you and have the exact genetic structure as you! But they dont do they! They have evolved! When you see a train go by , you didnt have to be there when it left the station to know its going by!