Mitochondrial DNA (mtDNA) is ideal for evolutionary analysis because of lack of recombination, a high substitution rate, and maternal inheritance. Previous analyses have been limited to short stretches of mtDNA, but in the 7 December
Tracking human origins
Mitochondrial DNA (mtDNA) is ideal for evolutionary analysis because of lack of recombination, a high substitution rate, and maternal inheritance. Previous analyses have been limited to short stretches of mtDNA, but in the 7 December Nature Ingman et al. present results based on complete mtDNA sequences of 53 humans of diverse origins (Nature 2000, 408:708-713). The greater detail allows the derivation of a phylogenetic tree for the sequences. Two pieces of data (the genetic distance between hum

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William Wells
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