The latest study characterizes more than 500,000 DNA markers in the human genome and examines variations across 29 populations on five continents [from 485 people] . . . . [it] produced genetic data nearly 100 times more detailed than previous worldwide assessments of human populations. . . . "it's becoming increasingly possible to use genomics to refine the geographic position of an individual's ancestors . . ."
Human genetic diversity decreases as distance from Africa—the cradle of humanity increases. People of African descent are more genetically diverse than Middle Easterners, who are more diverse than Asians and Europeans. Native Americans possess the least-diverse genomes. . . . The results also bolster the notion of "serial founder effects," meaning that as people began migrating eastward from East Africa about 100,000 years ago, each successive wave of migrants carried a subset of the genetic variation held by previous groups.