As a result of a mutation the DNA sequence AGT - TGA - CAT changes to AAT - TGA - CAT Which best describes the mutation?
It is a substitution in which the DNA base, G, was replaced with a different DNA base, A
O It is a deletion in which the DNA base, G was replaced with a different DNA base, A
It is a substitution in which three DNA bases AGT, were replaced with three different DNA bases, AAT.
O It is a deletion in which three DNA bases, AGT were replaced with three different DNA bases, AAT
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