exnihilo: "Yes, but the mutations occur in mitachondrial DNA located in the cytoplasm, not in the nucleus..."
What's the problem, exnihilo? You do seem to have an axe to grind over this issue. If you read the article, you'll see that it discusses only chromosomal DNA, with no reference whatever to mtDNA. Mutations in the latter are more frequent...
"Despite many generations of separation, researchers found only 12 differences among all the DNA letters examined. The two Y chromosomes were still identical at 10,149,073 of the 10,149,085 letters examined. Of the 12 differences, eight had arisen in the cell lines used for the work. Only four were true mutations that had occurred naturally through the generations"
...but what's your point? Is it that you believe the researchers botched their project, and that all similar research results are false or falsified?
