True Left

She said: “We have determined that members of communities related to the Mierzanowice, Strzyżów and Trzciniec cultures (which existed from 2,400 to 1,100 BC) genetically resembled populations from the steppe near the Black Sea area and their descendants, including the communities associated with the Corded Ware culture.”
...
According to Dr. Juras, the population associated with the Strzyżów culture has genetically most in common with steppe communities.

The descendants of people associated with the Strzyżów culture could have come to the lands of present-day south-eastern Poland with the first migration from the steppe during the late Neolithic. But they formed an isolated population that developed independently of the Corded Ware culture community. It is also possible that later in the Bronze Age there was an additional migration of people from the steppe.

French prehistory was punctuated by two waves of migration: the first during the Neolithic period, about 6,300 years ago, the second during the Bronze Age, about 4,200 years ago.
...
Admixture of the Neolithic populations with those from the Pontic steppes**, who arrived 4,200 years ago in what is now France, also left a lasting imprint, with the Y chromosome of the majority of French men still bearing the signature of men from the steppes.