Haplogroup I-FGC3621 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | I2a1b1a2b1a2a1a1a |
|---|---|
| Defining mutations | 1 |
| Downstream branches | 31 |
| Estimated age | 2,180 years |