DNA

Question 14 • Anatomy & Physiology A

Why might DNA mutation occur?

Answer

if the same amount of DNA remains unchanged for too long

if there is a genetic code that tells the DNA to mutate

if DNA only receives information from one gamete

if there is a change in DNA that alters or affects the genetic code

Explanation

A mutation is a change in the DNA sequence that can alter the genetic code. Therefore, the best choice is “if there is a change in DNA that alters or affects the genetic code.” The other choices describe DNA remaining unchanged or normal inheritance, not a cause or definition of mutation.

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