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  4. A class of mutation induced by addition or deletion of a nucleotide is called

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Q. A class of mutation induced by addition or deletion of a nucleotide is called

AMUAMU 1995

Solution:

: Frame shift mutations result from deletion or insertion of nucleotides in DNA that generates altered mRNAs. The deletion or addition of a single nucleotide in a coding strand of a gene results in an altered reading frame in the mRNA. The machinery translating the mRNA does not recognize that a base is added or missing, because there is no punctuation in the reading of codons. Thus a major alteration in the sequence of polymerized amino acids results.