So, how could healthy humans exist, that were supposedly evolved from apes?I don't think that anyone has ever bothered to try to do this nor are they too likely to try.
If an animal was born odds are that it would have troubles due to the genetic differences in their parents. For example tigers and lions can breed, but just barely. There offspring have a fairly high level of birth defects. The same would probably occur if you could get the ends of a ring species to breed. It would be a cruel experiment.
Wouldn't this cause major birth defects and sterilization too?