Chapter 5 of Gregory Cochran and Henry Harpending’s The 10,000 Year Explosion: How Civilization Accelerated Human Evolution (2009) is called “Gene flow,” and looks briefly at the evolutionary changes induced by mixing of genetically distinct populations.The chapter begins with the concept of a gene allele “sweep,” or the manner in which a favourable gene variant can spread throughout a population of people where interbreeding is general, but not highly isolated and localised. While most gene...
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