Quote Originally Posted by halfalp View Post
This is absolutely not true for europe before the neolithic... People tend to keep the same lineages and the same ancestry until populations with multiple lineage and mixtures from the middle-east enter in europe.
On what basis do you arrive at this conclusion? Why would people from the Middle East mix, but not people from Europe? Why would people coming in from the Middle East then also make them start to mix? I'm not convinced.
Pre-Neolithic Northern European populations were in any case a mix of Western and Eastern Hunter Gatherer lineages. Yamnayans were, in any case, a mix of Eastern Hunter Gatherer and Iranian-like DNA. We're even told that some Paleolithics mixed with Neanderthals, leaving a small remnant of Neanderthal in present day European DNA.