Haplogroup O-CTS4266 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a2b1a2a1a2a |
|---|---|
| Defining mutations | 1 |
| Downstream branches | 628 |
| Estimated age | 5,830 years |