A mutation is any natural or induced change in the genetic make-up of an organism. It could be further defines as, the changes in the amount, arrangement or structure of the DNA of an organism.

There exist generally 2 types of mutation according the cell which is mutating: germ cell mutation and somatic mutation. There also exist 2 others for how the mutation is taking place: gene mutation and chromosomal mutation. No matter be the case, the bottom line is the fact that, any change in the genetic make-up of an organism is a mutation.