Question

Examine the two strands of DNA below. Which kind of mutation occurred?

Original strand: AGC GTA CCC TAC

New strand: AGC GTA ACC TAC

(1 point)
Responses

substitution
substitution

frameshift
frameshift

insertion
insertion

deletion
deletion
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Answer 1

The difference between the original strand and the new strand is that the third "C" in "CCC" has been replaced by an "A," resulting in "ACC." This type of mutation is called a **substitution**, where one nucleotide is replaced by another without altering the overall length of the DNA strand.

Therefore, the correct answer is:

**substitution**