Wiktionary
a. Not mutated.
Usage examples of "unmutated".
They found a baby that was human, unmutated, and they brought it back, rejoicing that it had not been injured.
Baslim to guess that he might be of unmutated Earth ancestry, but not much could be certain save that he was small, scared, male, and still defiant The boy caught the beggar staring at him and glared back.
The boy looked like unmutated Earth stock and was pre-adolescent, but any guess would be based on unproved assumption.
The mutated strain was hideous enough, but the unmutated bacteria was worse.
Gens had to convince themselves that Simes were the evil spawn of the devil sent to destroy the integrity of the unmutated form of the Ancients.
Baslim to guess that he might be of unmutated Earth ancestry, but not much could be certain save that he was small, scared, male, and still defiant.