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Abstract. A nonsense mutation occurs when a sense codon, one that codes for an amino acid, is changed to one of the chainâtermination codons, UAG, UAA or UGA. A nonsense suppressor can result from a second mutation affecting the translational apparatus. This mutation enables the cell to insert an amino acid in response to the nonsense codon, resulting in a wildâtype or near wildâtype phenotype. Some suppressor mutations change the anticodon of a transfer ribonucleic acid (tRNA) such that it can pair with the nonsense codon.
Those that are not result in a mutation. Thus, mutation is a failure of DNA repair. There are many types of mutations, example MISSENSE MUTATIONS, Nonsense mutations, Silent mutations, and,Splice-site mutations.Here is a link where u can read more indepth, http://users.rcn.com/jkimball.ma.ultrane... mutation occurs when the DNA structure of the cell is mangled or broken. This can occur at birth of the living organism or by physical means like UV rays.