Gene A and Gene B both contribute to the pigmentation of flower in a plant. A dominant allele in either gene A or B codes for high blue pigment concentrations. The Punnett square for the AaBb X AaBb cross is given below (Note: The color of the box is indicative of the phenotype of the flower).




Determine the correct statement based on this information.

• A. The alleles a and B of the two genes are non-additive.
• B. The alleles A and B of the two genes are additive.
• C. The alleles a and b of the two genes are additive.
• D. The alleles A and b of the two genes are non-additive.

Answer: (B)