/mjuːˈteɪʃn/
mu·ta·tion
BrE /mjuːˈteɪʃn/
NAmE /mjuːˈteɪʃn/
[U, C] (biology)
a process in which the genetic material of a person, a plant or an animal changes in structure when it is passed on to children, etc., causing different physical characteristics to develop; a change of this kind
cells affected by mutation
genetic mutations
[U, C]
a change in the form or structure of sth
(linguistics) vowel mutation