A Haplogroup
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| A Haplogroup (M91) In human genetics is a Y-chromosome Haplogroup. It is found mainly in the Southern Nile region and Southern Africa. It represents the oldest and most diverse of the human Y-chromosome Haplogroups. It is believed to be the Haplogroup corresponding to Y-chromosomal Adam. |
Haplogroup
A is common among the Southern Sudanese (53%), especially the Dinka
Sudanese (62%), and Khoisan people, such as the Bushmen 12-44% presence
of Haplogroup A in South African Khoisan tribes.
It must be noted, however, that the subclade of Haplogroup A that is commonly found in East Africa and northern Cameroon (A3b2-M13) is different from those found in the Khoisan samples and only remotely related to them (it is actually only one of many subclades within Haplogroup A). This finding suggests an ancient divergence.
In 2007, seven men from Yorkshire, England sharing a distinctive surname were identified as being from the A1 subgroup of Haplogroup A. It was discovered that these men had a common male-line ancestor from the 18th century, but no previous information about African ancestry was known. The A-P108 subgroup is extremely rare. In addition to the seven Yorkshire men, only 25 living carriers of the A-P108 subgroup are known, all of West African ancestry.
A1, A1a, A1b, A2, A2a, A2b, A2c, A3, A3a, A3b, A3b1, A3b1a, A3b2, A3b2a, A3b2b are the subclades to this Haplogroup A.
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