Question

What is the result of a substitution mutation?

Answer 1

Answer:

A substitution is a mutation that exchanges one base for another (i.e., a change in a single "chemical letter" such as switching an A to a G). Such a substitution could: change a codon to one that encodes a different amino acid and cause a small change in the protein produced.

Answer 2

Answer:

The new amino acid may be the same as the original amino acid or it may be different.