point mutations

silent mutation

has no effect on amino acid sequence

missense mutation

change into a diff amino acid

nonsense mutation

change a codon to a stop codon

readthrough mutation

change a stop codon to a normal codon

frame shift mutation

insertion or deletion resulting in a big change in the polypeptide (protein)

suppresor mutations

one base deletion can be suppressed by a second one-base insertion mutation, the polypeptide has fewer changes to its amino acid sequence

truncated polypeptide

formed when a nonsense mutation occurs and translation stops early

nonsense suppressors

mutant tRNAs that insert an amino acid at a stop codon