mutation-rate doubling dose

A mutation is a permanent alteration in an organism's genetic material that can be passed to descendants. These changes can occur spontaneously due to errors in DNA replication or be induced by external factors like radiation or chemicals. Mutations can affect body cells (somatic mutations), potentially leading to conditions like cancer, or reproductive cells (germinal mutations), which can cause genetic diseases in offspring.1

The "mutation-rate doubling dose" refers to the amount of radiation needed to double the spontaneous rate of mutations in a generation. For humans, this dose is estimated to be between 0.2 and 2.5 Sv. While most mutations are harmful, some can be beneficial and provide the raw material for evolution through natural selection.21