Question

The insertion or deletion of a base pair into the genetic code will cause a frameshift mutation unless the number of base pairs inserted or deleted is

• A. 1
• B. 2
• C. 3
• D. 10

Answer 1

The correct option is C 3

In a chromosome deletion, the frame shift mutation will not occur if the number of bases is three. Because the bases are always read as triplet codons which has a set of three bases. If any one or two is missing, the reading of the codon, that is the frame for coding will cause frame shift mutation.