Haplogroup T is a human mitochondrial DNA (mtDNA) haplogroup. Haplogroup T derives from the haplogroup JT, which also gave rise to Haplogroup J. Haplogroup T is believed to have originated in Mesopotamia or Anatolia approximately 10,000 years before present, and to have moved northwards. It is found with particularly high concentrations around the eastern Baltic Sea, and the Urals.
Studies have shown mitochondrial haplogroup T to be associated with reduced sperm motility in males.  Though such studies were not studies on fertility, and reduced fertility needn't be inferred from such results.
People of haplogroup T Edit
The last Russian tsar, Nicholas II, has been shown to be of haplogroup T. This was established when genetic testing was done on his remains to authenticate his identity. As a consequence, all his matrilineal relatives have haplotype T. Assuming all relevant pedigrees are correct, this includes all female-line descendants of his female line ancestor Barbara of Celje (1390-1451), wife of Sigismund. This includes a great number of European nobles, including George I of Great Britain and Frederick William I of Prussia (through the Electress Sophia of Hanover), Charles I of England, George III of the United Kingdom, George V of the United Kingdom, Charles X of Sweden, Gustavus Adolphus of Sweden, Maurice of Nassau, Prince of Orange, Olav V of Norway, and George I of Greece.
See also Edit
- Spread of Haplogroup T, from National Geographic
- Genetic Genealogy: A Personal Perspective on Tara, Karelians and Kent, England
- Danish Demes Regional DNA Project: mtDNA Haplogroup T
- Analysis of a Haplogroup T sequence (T5/T2)
|most recent common mt-ancestor|
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