Biologyhard · Past Paper
Which of the following describes a frame-shift mutation?
AReplacement of one base with another
BInsertion or deletion of one or more nucleotides
CLoss of an entire chromosome
DInversion of a DNA segment
✓ Correct Answer: B — Insertion or deletion of one or more nucleotides
Frame-shift mutations occur when nucleotides are inserted or deleted, changing the reading frame of the genetic message.
Share this question