Y-DNA Haplogroup Tree

The human Y-DNA phylogeny (tree) shows the relationships among Y-DNA haplogroups. It is essentially a large family tree that shows how all males are connected through their paternal lineages. It is a stunning example of how humankind is connected and yet vastly diverse at the same time.

Modified from Underhill & Kivisild. 2007, Annu. Rev. Genet.