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)
○ frameshift
○ deletion
○ insertion
○ substitution

Explanation:

To determine the mutation, we compare the original and new DNA strands. The original has "CCC" and the new has "ACC"—one base (C to A) is changed, not added/removed (ruling out insertion/deletion/frameshift). Substitution is a single base replacement, matching here.

Answer:

D. substitution