Haplogroup BT (Y-DNA)

Haplogroup BT (Y-DNA)

In human genetics, Haplogroup BT, also known as Haplogroup YxA (SRY10831.1 (SRY1532), M42, M94, M139, M299) is a Y-chromosome haplogroup.

Haplogroup BT split off from haplogroup A 70,000 years bp (Karafet et al. 2008), probably originating in North East Africa. It contains all living human Y-DNA haplogroups except for A.

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