Mutant Pigeon With Giant Legs

Examples of Mutations in Animals
A mutation is a heritable alteration to a person's genetic makeup. Any size of the change is possible. The loss, addition, duplication, or rearrangement of entire chromosomes or chromosome parts constitutes large alterations. Evolution, cancer, and the maturation of the immune system, including junctional variety, are among the normal and malignant biological processes in which mutations play a role. All genetic variety originates from mutation, which also provides the basis for the action of evolutionary forces like natural selection.