Haplogroup O-TYT125661 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a1b1a1a1a1c1b1a |
|---|---|
| Defining mutations | 8 |
| Downstream branches | 6 |
| Estimated age | 1,640 years |