Frameshift mutations can do all of the following except

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Frameshift mutations involve the insertion or deletion of a base in the DNA sequence, which shifts the reading frame of the mRNA. This type of mutation can insert or eliminate amino acids, change the protein's amino acid sequence, or render the protein useless. However, they do not substitute one amino acid for another; that is typically the result of a missense mutation, where a single nucleotide change alters the codon to encode a different amino acid.

Frameshift Mutations Can Do All of the Following Except