Lordandmaster -> RE: We are Neanderthals (10/9/2005 4:45:20 PM)
|
Scientific American always comes in handy! By coincidence, there is an article in the current issue about founder mutations. These are mutations in the genetic material of a single individual that are passed on for generations because the recessive gene, when not paired with another recessive gene, confers ADVANTAGES, not disadvantages. The mutation that causes sickle-cell disease is a good example. When paired with another recessive gene, of course, the mutation causes sickle-cell disease. But a carrier who has only one recessive gene has a greater resistance to malaria than a human without the mutation. Anyway, founder mutations are interesting for several reasons, and one of them is that they are useful in tracing the ancient history of populations. One test that was applied had to do with whether early humans, after leaving Africa, interbred with other hominid types. The answer seems to be no. But I wouldn't consider this conclusive evidence. I'm not sure I understand how researchers could eliminate the possibility that modern humans have some Neanderthal DNA if they don't know anything about Neanderthal DNA in the first place.
|
|
|
|