Haplogroup O-F856 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a1b1a1a1a1a1a1a1a |
|---|---|
| Defining mutations | 20 |
| Downstream branches | 79 |
| Estimated age | 3,480 years |