Evolutionary science has never said that “kind” begets anything other than “kind”. Evolution is change over time and change over deep time bring about other species.
Given enough deep time argument, I suppose one could grow a foot up ones ass (pardon my French), but aren’t there better simpler explanations for the observation?
Of course you have left out natural selection. I’d doubt that having a foot up your ass would give you a competitive advantage making your genetic survival likely.