 On the other hand, on arrival at new distal locations, selection
would offer unknown selective forces that would have initially favored diversity in arrivals.By an unknown process, rapid evolution occurs, as has been seen in South Americas
indigenous population (Parham and Ohta, 1996, Watkins 1995), and new alleles rapidly
appear.This process may be of immediate benefit of being positively selective in that new environment, but these new alleles might also be 'sloppy' in a selective perspective, having side effects if selection changed.