Question

Genetic variability and mutation are at the heart of evolution. How do genetic mutations

directly arise within an organism?

Answer 1

A mutation is a change in DNA, the hereditary material of life. An organism's DNA affects how it looks, how it behaves, and its physiology. So a change in an organism's DNA can cause changes in all aspects of its life. Mutations are essential to evolution; they are the raw material of genetic variation.