sentence: Mutations are the ultimate source of variation, upon which 'natural selection' acts.
sentences_after: What happens is that some mutations affect the organism's ability to live and reproduce. This is an important part of the theory of evolution. The amount of heritable variation carried by a population can be huge, and as a consequence natural populations have the capacity to change and adapt to conditions in their environment.
concept_name: mutation
headings: Mutation Consequences of mutation
categories: Classical genetics Cell biology