Mutant (noun)

1. An organism that has undergone mutation.
2. A new genetic variant of a species or organism.

Origin:

Late 19th century: from latin mutant- "changing", from the verb mutare.

Examples:

1. The mutant fly had an extra pair of wings.
2. The new virus strain is thought to be a mutant form of the original virus.
3. The mutant plants were much larger and more resistant to disease than the original strain.
4. The mutant gene was passed down through several generations of the family.
5. The mutant power allows him to fly.