But we needn't expect Neanderthal mtDNA to persist given the obvious possibility of genetic drift removing it from the gene pool.
In the US alone, probably 5+ million military and former military personnel have their DNA on file, and probably about the same number of convicted criminals have done the same. Worldwide there has to be well over 100 million peoples DNA on file, and not a single one has neanderthal mDNA, or it would have made worldwide news.
I think the likelyhood of every single female line of neanderthal mDNA disappearing once it had been established as very small. I'm not even sure Genetic Drift would even come into the equation here. The female line would still pass down a unmistakably different mDNA line.
The only way to end a mDNA line is for every female of that line to die without having children.
Edited by DieChecker, 01 April 2013 - 05:08 AM.