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mutational Definition
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mutational
noun(mu-ta-tion)a significant and basic alteration : change
mutational
noun(mu-ta-tion)umlaut
mutational
noun(mu-ta-tion)a relatively permanent change in hereditary material that involves either a change in chromosome structure or number (as in translocation, deletion, duplication, or polyploidy) or a change in the nucleotide sequence of a gene's codons (as in frameshift or missense errors) and that occurs either in germ cells or in somatic cells but with only those in germ cells being capable of perpetuation by sexual reproduction; also : the process of producing a mutation