Noun
(genetics) any event that changes genetic structure; any alteration in the inherited nucleic acid sequence of the genotype of an organism
Source: WordNetIf you ever meet a guy and you fall in love with him, but because of some weird genetic mutation he doesn't seem to return the feeling?... Wear that dress. Ann Brashares
At least 15 percent of human females possess a genetic mutation that gives them an extra (fourth) type of color photoreceptor - and this allows them to discriminate between colors that look identical to the majority of us with a mere three types of color photoreceptors. David Eagleman
Only cells that had been transformed by a virus or a genetic mutation had the potential to become immortal. Rebecca Skloot