One of the most crucial factor that make North American tribes is much easier to colonize than the cenral America is the spread of diseases that wiped out a lot of north and south American population. Other factors would be that during that time, The central American tribes have more advanced defensive technology compared to the northern American
Blended inheritance is the concept that one offspring would have equal amount of traits from both parents, but this is not true, as offspring specializes it its own way as it grows
