A highly unstable recent mutation in human mtDNA.

Abstract excerpt

An A-to-G transition at position 16247 in the human mtDNA genome denotes haplogroup B4a1a1a and its sublineages. Informally known as the "Polynesian motif," this haplogroup has been widely used as a marker in Oceania of genetic affiliation with the Austronesian expansion. The 16247G allele has arisen only once in the human mtDNA phylogeny, about 7,000 thousand years ago, and is nearly fixed in Remote Oceania. We...

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