Haplogroup I-BY25359 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | I2a1b2a2b2a1 |
|---|---|
| Defining mutations | 1 |
| Downstream branches | 14 |
| Estimated age | 2,000 years |