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)
• insertion
• frameshift
• deletion
substitution

Answer 1

Substitution — a single base in the third codon changed (CCC → ACC). No bases were added or removed, so the reading frame is unchanged.