With Mexico, from all sources I have seen, Valley Of Mexico and Southern Mexico received more European migrants than Center West and Northern Mexico. But why are the latter two more European in genetics? First of all, lower prexisiting Ameridian populations. Second of all, cities were population sinks during the pre modern period, so lots of Europeans that ended up in places like Mexico City did not leave that many descendants. Lastly, Center west and Northern Mexico did not have nearby Ameridian peasant population who costanly move to nearby cities and towns.
With Mexico, from all sources I have seen, Valley Of Mexico and Southern Mexico received more European migrants than Center West and Northern Mexico. But why are the latter two more European in genetics? First of all, lower prexisiting Ameridian populations. Second of all, cities were population sinks during the pre modern period, so lots of Europeans that ended up in places like Mexico City did not leave that many descendants. Lastly, Center west and Northern Mexico did not have nearby Ameridian peasant population who costanly move to nearby cities and towns.
That is the weird thing about population dynamics. It is more complicated than one imagines.