What is the source of all genetic diversity?

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Multiple Choice

What is the source of all genetic diversity?

Genetic diversity comes from changes in DNA sequences, and the primary source of those new changes is mutations. Mutations introduce new alleles—variants of a gene—that weren’t present before. While recombination during sexual reproduction and gene flow can shuffle existing variants and spread them through a population, they don’t create new genetic material. Over generations, accumulating mutations provide the raw material for natural selection and adaptation. For example, a single nucleotide change can alter how a trait is expressed, and larger mutations can create new gene functions. The other options describe levels or groups rather than the source of new genetic variation, so they don’t explain where novel genetic diversity comes from.

Genetic diversity comes from changes in DNA sequences, and the primary source of those new changes is mutations. Mutations introduce new alleles—variants of a gene—that weren’t present before. While recombination during sexual reproduction and gene flow can shuffle existing variants and spread them through a population, they don’t create new genetic material. Over generations, accumulating mutations provide the raw material for natural selection and adaptation. For example, a single nucleotide change can alter how a trait is expressed, and larger mutations can create new gene functions. The other options describe levels or groups rather than the source of new genetic variation, so they don’t explain where novel genetic diversity comes from.

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