Sickle-cell hemoglobin, which causes sickle-cell anemia, arises from a single nucleotide mutation (substitution). Because of this, the normal hemoglobin and sickle-cell hemoglobin differ in a single amino acid. Normal hemoglobin has glutamic acid, whereas sickle-cell hemoglobin has valine at this position. Second letter A. Using the given codon table, indicate the mutant codon that could give rise to sickle-cell anemia B. Indicate the type of mutation that gave rise to sickle-cell anemia.