1. Non sense mutation: This mutation changes a codon that codes for an amino acid into a stop codon.
Example, UAC (which codes for the amino acid tyrosine) is mutated to UAA, which is one of the three stop codons in mRNA.
2. Mis sense mutation: This type of mutation results in a single amino acid change in the protein sequence. It occurs when a change in a single nucleotide results in the substitution of one amino acid for another in the protein.
Example, Misense mutation where the second codon changes from GUC (Valine) to GGC (Glycine)
3. Silent mutation: This is a change in the DNA sequence that does not alter the amino acid sequence of the protein. It occurs because of the redundancy in the genetic code (multiple codons can code for the same amino acid).