Out-of-Africa Migration May Have Involved More Men Than Women
Researchers from Harvard Medical School, the Broad Institute, and the National Human Genome Research Institute assessed more than 130,000 SNPs and a billion bases of sequence data representing individuals of West African, European, and East Asian descent. Together, the X chromosome and autosomal chromosome data suggest that the effective female population size was unexpectedly low when humans migrated from Africa to other parts of the world some 60,000 years ago.
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