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Mutation is defined as:

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Alteration of DNA sequences that consequently results in changes in the genotype but no change in the phenotype of an organism.

Alteration of DNA sequences that consequently results in changes in the genotype and the phenotype of an organism.

Alteration of DNA sequences and consequently results in changes in the phenotype but no changes in the genotype of an organism.

Alteration in gene function that are mitotically and/or meiotically heritable and that do not involve a change in DNA sequence.

answer is B.

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Detailed Solution

Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype
of an organism. In addition to recombination, mutation is another phenomenon that leads to variation in DNA.

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