Haplogroup R-L257 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | R1b1a1b1a1a1b1a1 |
|---|---|
| Defining mutations | 1 |
| Downstream branches | 2 |
| Estimated age | 2,900 years |