Allan C. Wilson, who used DNA to trace the origin of modern humans to a woman living 200,000 years ago, has received the 1991 3M Life Sciences Award, presented by the Federation of American Societies ...
Researchers constructed a phylogenetic tree based upon human mitochondrial DNA (mtDNA) variation. A branch bifurcates whenever they found an additional polymorphism. At the top of the inverted tree is ...
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