"We are really just at the beginning of the field, " says David Reich of the Whitehead Institute in Cambridge, Mass.
The DNA sequence differences between humans and chimpanzees is about 35 million David Reich, should help in understanding the genetic basis of some human diseases.
Two Whitehead postdoctoral fellows led the research : Pardis Sabeti, 26, who is also a Harvard Medical School student, and David Reich, 28.
Two biologists at the University of Oxford in England, David Reich and David Goldstein, posed that question and got the same answer as to the first : Africa.
"He has no formal education about this, but it doesn't mean he doesn't know what he's talking about, " said David Reich, a chiropractor from Queens.
David Reich of the Whitehead Institute in Cambridge, Mass ., described an ingenious method to recognize recently selected genes, based on the length of the unchanged DNA that the beneficial mutation drags along with it between generations.
While other research has shown signs of such a bottleneck in human prehistory, those were based on weak evidence, said David Reich, lead author of a paper on the new research being published in the current journal Nature.
These results show that India experienced a demographic transformation several thousand years ago, from a region in which major population mixture was common to one in which mixture even between closely related groups became rare because of a shift to endogamy . " } } Speaking to Fountain Ink, David Reich stated, " Prior to 4, 200 years ago, there were unmixed groups in India.
These results show that India experienced a demographic transformation several thousand years ago, from a region in which major population mixture was common to one in which mixture even between closely related groups became rare because of a shift to endogamy . " } } Speaking to Fountain Ink, David Reich stated, " Prior to 4, 2000 years ago, there were unmixed groups in India.