Human beings have 23 pairs of chromosomes but our closest cousins the chimpanzees have 24 pairs. This was at one time a puzzle because if, as the theory of evolution says, both species share a common ancestor, how could it be that in the relatively short time after the human and chimp lines separated about six million years ago, humans could have lost an entire chromosome, with all the genetic information it contained, and yet survived as a species? [Read more…]
