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In human population genetics, Haplogroup A-L1085 is the lineage of almost all human males alive today. As a deep branch on the homo tree, it has two functions in population genetics. The first is as an inclusive parent branch. The second is a paragroup A-L1085 *. ==Origin== Many proposals for haplogroup A-L1085's origin suggest it was associated with the ancestral population of Southern Africa's hunter-gatherers. This is because haplogroup A-L1085 lineages are frequent among the San people. However, the A-L1085 lineages of Southern Africa are subclades of A lineages found in other parts of Africa. This suggests that A-L1085 lineages arrived in Southern Africa from elsewhere. The two most basal lineages of Haplogroup A-L1085, A-V148 and A-P305, have been detected in West Africa, Northwest Africa and Central Africa. Cruciani et al. 2011 suggests that these lineages may have emerged somewhere in between Central and Northwest Africa, though such an interpretation is still preliminary due to the incomplete geographic coverage of African y-chromosomes.〔 Initial studies reported that Haplogroup A-L1085 lineages emerged around 60,000 years ago which was significantly more recent than TMRCA for mitochondrial DNA lineages which coalesce to between 150-200kya. Cruciani et al. 2011 with major restructuring of branches pushed back the root of the Y-chromosome tree to 142,000 years ago.〔 In November 2012, a new study by Scozzari et al. reinforced "the hypothesis of an origin in the north-western quadrant of the African continent for the ''A1b haplogroup'', and, together with recent findings of ancient Y-Chromosome lineages in central-western Africa, provide new evidence regarding the geographical origin of human MSY diversity". 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Haplogroup A-L1085」の詳細全文を読む スポンサード リンク
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