Answer:
(B). Missense
Explanation:
A mutation that causes incorporation of an incorrect amino acid in a synthesizing protein is known as missense mutation. It involves a single nucleotide change in DNA sequence that leads to change in codon, which codes for a different amino acid.
For example, in sickle cell disease, the sixth amino acid, glutamic acid in polypeptide chain is replaced with valine due to change in codon from GAG (codes for glutamic acid) to GTG (codes for valine).
Thus, the correct answer is option (B).
