> The Steppe migration resulted in a 90 percent replacement of the population. >While only 40 percent of the population about 6,000 years ago comes from the Steppes, 100 percent of the Y chromosomes do. From reading this article it seems another way that this could be phrased, is that we are all the descendants of perpetrators of genocide.
100% of your Ys coming from one place is the opposite of "mutt", too. But the only way you can get to do race science is by coming to the conclusion "There's no such thing as race" first, and making the details sound boring enough that nobody asks.