Question

missense, nonsense, and silent mutations are examples of which type of mutation?
substitution
insertion
deletion
replication

Explanation:

Missense, nonsense, and silent mutations all involve the replacement (substitution) of one nucleotide with another in DNA. Insertion adds nucleotides, deletion removes them, and replication is DNA copying, not a mutation type. So these mutations are substitution mutations.

Answer:

A. substitution