What are the arguments for & against Out of Africa & Multiregional hypothesis?

Question

I have an essay coming up .. I can just predict! Anthro students & experts please help!

Answer 1

Anthropology has a real problem here. On one hand the " Out Of Africa " theory just received a recent boost that was overkill, actually. The X and Y chromosome evidence, plus the archaeological evidence strongly support OOA and biologists and geneticists accept this.

The multiregional explanations use what could just as well be local responses to environmental conditions as physiological support for their position. But their does not meet the standards and is not parsimonious; not nearly enough against the better alternative explanations.

http://www.sciencedaily.com/releases/200...

Just a bit of the myriad evidence.

Answer 2

The OOA says that all the Homo Erectus fossils found outside of Africa were dead ends. That they isolated themselves and died off. That humans are all from a small group of Homo Erectus that left Africa much later than other Homo Erectus found thru out the world. They were successful whereas earlier Homo Erectus were failures. The problem I see is that Humans (Homo) do not isolate themselves. That an earlier group would be just as likely to survive as later groups. Differences in humans would take longer than the quick variety required in OOA.  The big difference is time not where the first prehumans came from. African DNA could have been added in recent populations and not neccesarily from the beginnings. OOA just doesn't make sense to me. Thanks.

http://www.actionbioscience.org/evolutio...