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The mtDNA Haplogroup A Homepage
Haplogroup A is one of the four major clans that migrated from Siberia across the Bering Strait land bridge to the Americas about 20,000 years ago (the other clans being B, C, and D).

Quick Facts:
· In 1992, haplogroups A, B, C, and D were the first to be named with a single letter.
· Haplogroup A contains a characteristic HaeIII site at nucleotide 663.
· Haplogroup A split from the N supergroup roughly 50,000 to 60,000 years ago.
· A is more common in northern areas of the Americas.
For further information about Haplogroup A, including its origins and migrations, see The History of mtDNA Haplogroup A
Many companies now offer mtDNA testing, find a comprehensive list here.
There are a number of websites dedicated to Genetic Genealogy, find a list here.