# Haplogroup A-P305

Haplogroup A-P305 also known as A1 is a human Y-chromosome DNA haplogroup. Like its parent haplogroup haplogroup A0-T (A-L1085), A1 includes the vast majority of living human males. It emerged in Africa approximately 161,300 years ago. By comparison, members of its sole sibling subclade, haplogroup A0 – the only other primary subclade of haplogroup A0-T – are found mostly in Africa.
Basal, undivergent A-P305* is largely restricted to populations native to Africa, though a handful of cases have been reported in Europe and Western Asia. A-P305* is found at its highest rates in Bakola Pygmies (South Cameroon) at 8.3% and Berbers from Tunisia at 1.5% and in Ghana. The clade also achieves high frequencies in the Bushmen hunter-gatherer populations of Southern Africa, followed closely by many Nilotic groups in Eastern Africa. However, haplogroup A's oldest sub-clades are exclusively found in Central-Northwest Africa, where it, and consequently Y-chromosomal Adam, is believed to have originated about 140,000 years ago. The clade has also been observed at notable frequencies in certain populations in Ethiopia, as well as some Pygmy groups in Central Africa.

## Footnotes

* 1 2 "A1 YTree". www.yfull.com.
* 1 2 Cruciani F, Trombetta B, Massaia A, Destro-Bisol G, Sellitto D, Scozzari R (Jun 2011). "A revised root for the human Y chromosomal phylogenetic tree: the origin of patrilineal diversity in Africa". American Journal of Human Genetics. 88 (6): 814–8. doi:10.1016/j.ajhg.2011.05.002. PMC 3113241. PMID 21601174.
* ↑ Scozzari R, Massaia A, D'Atanasio E, et al. (2012). "Molecular dissection of the basal clades in the human Y chromosome phylogenetic tree". PLOS ONE. 7 (11): e49170. Bibcode:2012PLoSO...749170S. doi:10.1371/journal.pone.0049170. PMC 3492319. PMID 23145109.
vtePhylogenetic tree of human Y-chromosome DNA haplogroups :
This article needs to be updated. Please help update this article to reflect recent events or newly available information. (February 2021) :
"Y-chromosomal Adam"
A00
A0-T
A0
A1
A1a
A1b
A1b1
BT
B
CT
DE
CF
D
E
C
F
F1
 F-Y27277
 F3
 GHIJK
G
HIJK
IJK
H
IJ
K
I  
J 
   LT
      K2
I1  
I2 
J1  
J2 
L  
  T 
K2e
K2d
K2c
K2b 
K2a
K2b1
  P
K-M2313
S
 M   
P1  
NO1
P1c
P1b
P1a
N
O
R
Q :
Y-DNA by population
Y-DNA haplogroups of historic people
Footnotes
↑ Van Oven M, Van Geystelen A, Kayser M, Decorte R, Larmuseau HD (2014). "Seeing the wood for the trees: a minimal reference phylogeny for the human Y chromosome". Human Mutation. 35 (2): 187–91. doi:10.1002/humu.22468. PMID 24166809. S2CID 23291764.
↑ International Society of Genetic Genealogy (ISOGG; 2015), Y-DNA Haplogroup Tree 2015. (Access date: 1 February 2015.)
↑ Haplogroup A0-T is also known as A-L1085 (and previously as A0'1'2'3'4).
↑ Haplogroup A1 is also known as A1'2'3'4.
↑ F-Y27277, sometimes known as F2'4, is both the parent clade of F2 and F4 and a child of F-M89.
↑ Haplogroup LT (L298/P326) is also known as Haplogroup K1.
↑ Between 2002 and 2008, Haplogroup T-M184 was known as "Haplogroup K2". That name has since been re-assigned to K-M526, the sibling of Haplogroup LT.
↑ Haplogroup K2b (M1221/P331/PF5911) is also known as Haplogroup MPS.
↑ Haplogroup K2b1 (P397/P399) is also known as Haplogroup MS, but has a broader and more complex internal structure.
↑ Haplogroup P (P295) is also klnown as K2b2.
↑ K-M2313*, which as yet has no phylogenetic name, has been documented in two living individuals, who have ethnic ties to India and South East Asia. In addition, K-Y28299, which appears to be a primary branch of K-M2313, has been found in three living individuals from India. See: Poznik op. cit.; YFull YTree v5.08, 2017, "K-M2335", and; PhyloTree, 2017, "Details of the Y-SNP markers included in the minimal Y tree" (Access date of these pages: 9 December 2017)
↑ Haplogroup S, as of 2017, is also known as K2b1a. (Previously the name Haplogroup S was assigned to K2b1a4.)
↑ Haplogroup M, as of 2017, is also known as K2b1b. (Previously the name Haplogroup M was assigned to K2b1d.) :
* This genetics article is a stub. You can help Wikipedia by expanding it.
* v
* t
* e