Chimp 'X factor': Extensive adaptive evolution specifically targeting the X chromosome of chimpanzees

Chimp 'X factor': Extensive adaptive evolution specifically targeting the X chromosome of chimpanzees: Genetic mutations that boost an individual's adaptability have greater chances of getting through to X chromosomes -- at least in chimpanzees, according to new Danish research. An analysis of the genes of 12 chimpanzees has now demonstrated that the chimpanzee X chromosome plays a very special role in the animal's evolutionary development.