Haplogroup O-A12442 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O1a1a1a1a1a1d |
|---|---|
| Defining mutations | 3 |
| Downstream branches | 66 |
| Estimated age | 2,870 years |