Moths from Mars usually have dark-blue eyes. You can culture these moths by allowing adult females to lay their eggs onto an artificial medium. After the eggs hatch, the larvae eat the medium, grow, enter a pupal stage, and eventually metamorphose into an adult. You obtain two independently-isolated Martian moth mutants cyan-1 and cyan-2. When grown on artificial medium, both mutant strains have light-blue eyes instead of the wildtype dark-blue. You know that wildtype alleles at the cyan-1 and the cyan-2 loci produce enzymes in a single linear biochemical pathway for eye color. Although you do not know the order in which the enzymes act within the pathway, you do know that the enzymes turn a light-blue precursor into an intermediate metabolite, and then turn this intermediate metabolite into the dark-blue final product. Part A If the enzyme product of the cyan-2 locus acts before the enzyme product of the cyan-1 locus in the linear pathway, then cyan-2 mutants will accumulate the light-blue precursor. If the enzyme product of the cyan-2 locus acts before the enzyme product of the cyan-1 locus in the linear pathway, then cyan-2 mutants will accumulate the light-blue precursor.

a. True
b. False