Haplogroup O-Z25921 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a2b1a1a1a4 |
|---|---|
| Defining mutations | 5 |
| Downstream branches | 504 |
| Estimated age | 6,780 years |