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Haplogroup T-M184
In molecular evolution, a haplogroup is a group of similar haplotypes that share a common ancestor having the same single nucleotide polymorphism (SNP) mutation in all haplotypes. Haplogroup T-M184 is a human Y-chromosome DNA haplogroup. From 2002 to 2008, it was known as Haplogroup K2.
The UEP which defines this clade is generally considered to be the single nucleotide polymorphism (SNP) M184. Other SNPs (M272, PAGES129, L810, L455, L452, L445) are currently considered to be phylogenetically equivalent.
== Origins ==
Haplogroup T is a widespread but rare haplogroup that originated about 20,000 years ago, probably on the Arabian peninsula. Today it is found across Eurasia and northern Africa, but rarely at levels above 10%. It is most common in the Near East, Arabia and the Horn of Africa, especially among Iraqis and northeastern Africans.
Beyond Africa, T has been detected at levels of about 4% in southern and eastern India and about 2% in Iberia. It is possible that this represents contributions from northern Africa, but it could also be that T reached southwestern Europe with farmers who introduced agriculture from the Near East. H
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