Haplogrupo A (ADN-Y)

Haplogrupo A

Tempo de origem 140,000 ypb,[1] 237,000YBP - 581,000 YBP[2]
Lugar de origem África
Ancestral Humano Y-MRCA
Descendentes A0, A1
Mutações definidas M91
Alta frequência Namíbia (Tsumkwe San, Nama) 60-70%
Sudão do Sul (Dinka, Shilluk, Nueres) 33%-61.5%

Em genética humana, Haplogrupo A (M91) é um marcador genético que se encontra com mais frequência nos naturais na regia sul do rio Nilo e no sul de África. Representa o cromossoma mais antigo e com maior divergência. Supõe-se que seja o cromossoma mais próximo do ancestral comum a todos os homens.

Haplogrupo A é comum entre o povo Khoisan.

De acordo com a versão 8.75, de 6 Setembro de 2013, da Sociedade Internacional de Genealogia Genética (ISOGG), a ramificação que separa A0-P305 de A1-V161, pode ter ocorrido há cerca de 140 mil anos. Os haplogroupos A0-P305, A1a M31 e A1b1a-M14 encontram-se em África e o A1b1b-M32 é mais frequente em África. O haplogrupo que seria classificado como A1b2 é composto pelos haplogrupos de B a T. A ramificação interna do haplogrupo A1-V161 em A1a-M31, A1b1 e BT (A1b2) pode ter ocorrido há cerca de 110.000 anos. O A0-P305 é pouco frequente na África Central e Ocidental. O A1a-M31 é mais frequente no noroeste africano. O A1b1a-M14 é frequente nas populações que falam línguas khoisan. O A1b1b-M32 tem uma distribuição mais ampla; desde as população de língua Khoisan, no sul, a populações do Leste Africano bem como fora do continente africano entre populações dispersas na Península Arábica.

Ligações externas

Ver também

Haplogrupos do cromossoma Y humano

cromossoma Y comum a todos os homens
A
BT
B CT
DE CF
D E C F
G H IJK
IJ K
I J LT K2
L T MS P NO
M S Q R N O
R1 R2
R1a R1b

Referências

  1. ↑ Cruciani, Fulvio; et al. (19 de maio de 2011). «A Revised Root for the Human Y Chromosomal Phylogenetic Tree: The Origin of Patrilineal Diversity in Africa». 88 (6). PMC 3113241Acessível livremente. PMID 21601174. doi:10.1016/j.ajhg.2011.05.002. Consultado em 11 de junho de 2011 
  2. ↑ http://www.sciencedirect.com/science/article/pii/S0002929713000736

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