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a frameshift mutation is a genetic mutation in which a number of nucleotides not divisible by three are either inserted into or deleted from a nucleic acid sequence
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the addition or deletion of one or more nucleotides in a strand of DNA, which shifts the codon triplets of the genetic code of messenger RNA, resulting in a mutation.
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