B.
A mutation that adds or removes nucleotides, altering the reading frame
C.
A mutation that occurs in non-coding regions
D.
A mutation that duplicates a segment of DNA
Solution
A frameshift mutation occurs when nucleotides are added or deleted from the DNA sequence, shifting the reading frame and potentially altering all downstream amino acids.
Correct Answer:
B
— A mutation that adds or removes nucleotides, altering the reading frame
