Haplogroup O-CTS3776 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a2b1a2a1a1b |
|---|---|
| Defining mutations | 3 |
| Downstream branches | 1,917 |
| Estimated age | 9,180 years |