Haplogroup O (Y-DNA)

Haplogroup O (Y-DNA)

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Haplogroup O (Y-DNA)

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In human genetics, Haplogroup O (M175) is a Y-chromosome DNA haplogroup. Haplogroup O is a close cladistic brother group with Haplogroup N, and is one of several descendants of Haplogroup K (the intermediates being Haplogroup MNOPS and Haplogroup NO).


Haplogroup O is a descendant haplogroup of Haplogroup NO (M214), and first appeared according to different theories, either in Southeast Asia, or East Asia. approximately 35,000 years ago. Haplogroup O shares a node in the phylogenetic tree of human Y-chromosomes with Haplogroup N, which is common throughout North Eurasia.


This haplogroup appears in 80-90% of most of populations in East and Southeast Asia, and it is almost exclusive to that region: M175 is almost nonexistent in Western Siberia, Western Asia, Europe, and Africa and is completely absent from the Americas, although certain subclades of Haplogroup O do achieve significant frequencies among some populations of South Asia, Central Asia, and Oceania.

Among the subbranches of Haplogroup O are Haplogroup O1, Haplogroup O2, and Haplogroup O3.

Paragroup O*

Haplogroup O* lineages, which belong to...
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