A scientist uses polymerase chain reaction (PCR)to compare the sequence of a disease and a healthy gene.The scientist finds that these two genes are identical except for one G in place of a T at position 256 in the gene.This type of mutation is a(n)

Question

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A substitution mutation refers to when one nucleotide base is replaced with another in the DNA sequence. In this case, the disease gene and the healthy gene are identical except for the substitution of a G in place of a T at position 256.

A Scientist Uses Polymerase Chain Reaction (PCR)to Compare the Sequence