Haplogroup R-L20 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | R1b1a1b1a1a2b1a1 |
|---|---|
| Defining mutations | 3 |
| Downstream branches | 53 |
| Estimated age | 3,900 years |