What are the main causes that drive DNA replication fidelity and genetic variation?

Question

How do cellular mechanisms and environmental factors contribute to the accuracy of DNA replication and the generation of genetic diversity?

Answer

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DNA replication’s accuracy hinges on polymerase proofreading and mismatch repair, while genetic diversity arises from recombination, transposons, and environmental mutagens....

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dna replication genetic variation mutation repair meiosis environmental mutagens