The phases through which chromosomes replicate, divide, shuffle, and recombine are imperfect, as DNA is subject to random mutations. Mutations do not always produce harmful outcomes. In fact, many mutations are thought to be neutral, and some even give rise to beneficial traits. To corroborate Darwin’s theory, scientists would need to find a valid explanation for why a chromosome pair is missing in humans that is present in apes.
This flash video describes the evidence for human evolution. Courtesy of YouTube’s Potholer54.
This flash video traces our migration out of Africa and explains, through DNA evidence, how humans colonized the world. Courtesy of YouTube’s Potholer54.
