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either new organisms entered the population from an external source, or there were mutations

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14y ago
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12y ago

New alleles arise through mutations (e.g., point mutations, like when the base or nucleotide A is changed to C, G, or T) and recombination of existing alleles.

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Mutation in parent cells.

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mutation

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mutation

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11y ago

mutations

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mutation

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Q: What is the major source of new alleles in natural populations?
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