Haplogroup O-CTS6777 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a1b1a1a1a1a1a1 |
|---|---|
| Defining mutations | 1 |
| Downstream branches | 512 |
| Estimated age | 8,040 years |