It was a direct readout of a specific biological reality, preserved in a bone fragment for 90,000 years.

The Chromosome-Level Evidence

The evidence for Denny’s parentage was not just statistical — it was visible at the chromosome level.

And this chromosome-level evidence is worth understanding in some detail, because it is the most direct proof available of what her ancestry was.

Each human cell contains 46 chromosomes — 23 pairs, with one member of each pair inherited from the mother and one from the father.

For chromosomes 1 through 22 (the autosomes) and the X and Y sex chromosomes (Denny had two X chromosomes, confirming she was female), each chromosome consists of a continuous double helix of DNA — a specific, continuous sequence of base pairs running from one end of the chromosome to the other.