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Would natural selection work if the younger generation were genetically identical to the older generation? That...

Would natural selection work if the younger generation were genetically identical to the older generation? That is, are mutations and the combining of DNA from both parents required for natural selection to work?

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No, if young generations are genetically identical or there is no genetic variation, then there will be no natural selection. Natural selection is differential reproduction of organisms of heritable trait function that influence the adaptation to the environment. Mutation or combination of genetic material from both of the parents may cause variation in the genetic characteristic of young generation and that makes the natural selection to work. Genetic variation induces natural selection.

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