I-Y21091 is a branch on the paternal tree of human kind. It and branches help trace human history from our origin in Africa.
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I-Y21091 Technical Details
This branch is defined by the Y-Haplotree at FamilyTreeDNA as I-Y21091. There, it is the child of the I-L22 branch.
This branch is defined by YFull as I-Y21091. There, it is the child of the I-Y2109 branch.
Sources & Resources
Peer reviewed sources have not been added for this branch yet. If you know of one I have missed, please link to it in the comments.