<prompt> Base substitution mutations can have the following molecular consequence, EXCEPT:Changes one codon for an amino acid into another codon for that same amino acidCodon for one amino acid is changed into a codon of another amino acidReading frame changes downstream to the mutation siteCodon for one amino acid is changed into a translation termination codon  <response>: Reading frame changes downstream to the mutation site occurs in frameshift mutations but not in base substitution mutations. Ref: Harper Illustrated Biochemistry, 26th Edition, Chapter 38, Pages 361-64 