Answer
Silence, missense, nonsense
Work Step by Step
Three effects of point mutations (the alteration of one base pair) are silence, missense, nonsense. In a silent mutation, the altered base pair is the same amino acid. In a missense mutation, a codon changes from one amino acid into a codon for a different amino acid. In a nonsense mutation, the base-pair substitution changes an amino codon into a stop codon.
