The first line was the 50-50 ancestry proportion.

When scientists analyze an ancient genome by comparing it against known reference populations, they can estimate the proportion of ancestry from different groups.

For Denny, the nuclear genome showed approximately equal contributions from Neanderthal and Denisovan ancestral populations, with no indication of previous admixture in either direction.

This proportion — 50 percent from one group, 50 percent from the other — is the classic signal of a first-generation F1 hybrid in genetics.

The second line was the mitochondrial DNA.