Haplogroup A (Y-DNA)

Haplogroup A is a human Y-chromosome DNA haplogroup, which includes all living human Y chromosomes. Bearers of extant sub-clades of haplogroup A are almost exclusively found in Africa (or among the African diaspora), in contrast with haplogroup BT, bearers of which participated in the Out of Africa migration of early modern humans. The known branches of haplogroup A are A00, A0, A1a, and A1b1; these branches are only very distantly related, and are not more closely related to each other than they are to haplogroup BT.

This article is about the human Y-DNA haplogroup. For the unrelated human mtDNA haplogroup, see Haplogroup A (mtDNA).
Haplogroup A
Possible time of origin270,000 BP, 275,000 BP (303,000-241,000 BP), 291,000 BP
Coalescence age275,000 BP (split with other lineages)
Possible place of originNorthwest Africa, Central Africa
AncestorHuman Y-MRCA (A00-T)
Descendantsprimary: A00 (AF6/L1284), A0-T
(Subclades of these include haplogroups A00a, A00b, A00c, A0, A1, A1a, A1b, A1b1 and BT.)
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