Gene Mutations

Gene Mutations

1. Point Mutations

   • Substitution
     • Silent Mutation
       • Nitrogenous base is changed but not the amino acid
     • Missense
       • Both the nitrogenous base and amino acid are changed.
     • Nonsense
       • A stop codon is prematurely coded for.
   • Frameshift Mutations
     • Insertion
       • One base is inserted into the DNA. Changes are dramatic.
     • Deletion
       • One base is deleted from the DNA sequence. Changes are dramatic.

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