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Why MTDNA Group W Does Not Descend from Ashkenazi Jews
When the National Geographic web site displays a Group W person's 'genographic' history, it gives the impression that N1's are found only among Ashkenazi Jews, and therefore that W's, being descended from N1a's, are descended from Ashkenazi Jews. This is not the case! Genographic has oversimplified the matter to the point of distortion.
Quite simply, the W's split from the N1's between 49,000 and 26,800 years ago (see When did Ws split from the N haplogroup? The specific lineage found in Ashkenazi Jews was a particular mutation of N1b that occurred only around 2,000 years - tens of thousands of years after the W's began (see page 5 and the last page of the original paper on this: here .
Other authoritative sites differentiate N1a and N1b:
N1a: N1a is traceable in inhabitants of Eurasia, particularly those of Iran and some Indian territories. The haplogroup's representation is limited to the flat, barren steppe of western and central Asia.The point is, these events (splitting of N to N1, then N1 to W, N1a, N1b) happened tens of thousands of years ago, at a time when (scientifically) there was no differentiation of peoples into modern ethnic groups. The particular N1b motif among the Ashkenazi are laid to a founder event about 2000 years ago. This is interpreted to mean that half of the Ashkenazi are descended from a very small group of women from the Near East of four mtdna haplotypes who migrated to central Europe about 2,000 years ago.N1b: The peoples of the Near and Middle East regions of Asia can be found among N1b's progeny. Scientists have linked this haplogroup specifically with the Jewish Ashkenazi peoples.
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