You said it. All I meant was that, having left someplace without a G2a population component, if Z196 didn't walk through the European subcontinent but took boats (or a different, mostly land route), there was no requirement of picking up G2a along the way. Also, G2a may have daughtered out in some places that are relevant -- or were, at the time of the Z196 movement. Or there might have been a caste system. That could be at their place of departure; some intermediate stopover (such as Liguria, which btw is not my suggestion but one that has been made by a French colleague); or the Basque country in which the M153 subclade, at least, ended up. What we see in populations today may not reveal much about what these migrants (traders, conquerors, lovers, musicians, guys with high sperm count, or whatever they were) saw, roughly 5,000 years ago.