The following molecular phylogenetic tree provides evidence for which hypothesis

Question

The following molecular phylogenetic tree provides evidence for which hypothesis about a major evolutionary event?

-All human populations are derived from recent African ancestry

-All human populations are derived from recent Asian ancestry

-Homo erectus populations could interbreed and gradually assimilated into the Homo Sapiens populations

-Hominins across the old world were a single species connected by gene flow

India Central Asia Europe Middle East East Asia Americas Out of Africa Oceania Saharan Africa Eastern Africa African Americans Western/central Africa Figure 9.11 By comparing DNA from many populations of humans, Sarah Tishkoff and her colleagues used a neighbor-joining approach to produce an evolutionary tree of our species. Because humans have been in Africa much longer than in other parts of the world, Africans today are alsa much more genetically diverse than other humans. A small group ated mans. A small group of Africans mg out of the continent and became the Pygmies Southern Africa/pygmies ancestors of today's Europeans, Asians.a people of the New World. (Adapted from Tishkoff et al. 2009.) 282 CHAPTER NINE THE HISTORY IN OUR GENES

Explanation / Answer

Yes all human populations are derived from recent African ancestry

Here, mankind genomic variation and the genetic architecture of complex charactaristics have intensed on non-African populations. Africa is the site of modern human origins which comprises the hightest levels of mankind genetic variation, and is the origin of the global range expansion of modern mankind in the past one lakh years.

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