Yes this is considered as mutation .
What is mutation ?
Mutation is a change in the nucleotide sequence of a short region of a genome .
mutation could be of any type like point mutation ,in which one nucleotide is replaced by the other one .
Mismatch occurred during DNA replication completely changes the information and same changed information is then pass to other generation and so on .
Hence , this mismatching is considered as .
To learn more about the mutation from the given link https://brainly.com/question/14438201
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