Molecular basis of heredity · Zoology

A mutation is best defined as:

  1. A change in protein structure only
  2. A change in the total chromosome number
  3. Permanent change in DNA sequence
  4. Temporary gene expression change
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Correct answer: Permanent change in DNA sequence

A mutation is a permanent alteration in the DNA sequence. It can create new alleles and genetic variation.

Difficulty: Medium Question 18 of 20

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