Question

A frameshift mutation could result from

• A. A base insertion only.
• B. A base deletion only.
• C. A base substitution only.
• D. Either an insertion or a deletion of a base.

Answer 1

Answer: (D)

Either an insertion or a deletion of a base.

The sequence of three nucleotides of either DNA or RNA is known as a codon. The gene expression is performed by codons either by insertion or deletion of a base which can change the reading frame of sequence.hence the frameshift mutation occurs.

So the correct answer is 'Either an insertion or a deletion of a base'.