Haplogroup O-Y37861 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a2a1a2a1a1a2a |
|---|---|
| Defining mutations | 15 |
| Downstream branches | 183 |
| Estimated age | 9,800 years |