The picture with the Indo-Europeans becomes a little clearer when you distinguish between Y-chromosomal and mitochondrial DNA. The genetic continuity with pre-I

The picture with the Indo-Europeans becomes a little clearer when you distinguish between Y-chromosomal and mitochondrial DNA. The genetic continuity with pre-Indo-Europeans is entirely on the mothers’ side; the Y-chromosome DNA of that population was entirely replaced with that of Indo-Europeans.