In corn the dominant allele P causes purple corn kernels, and the recessive allele p causes white kernels. On a separate chromosome pair is another gene effecting kernel texture. The dominant allele R causes round kernels, and the recessive allele r causes wrinkled kernels. If PpRr plant is crossed to another PpRr plant, what is the expected phenotypic ratio of the F1 plants? �

Select one:
a. 9 white wrinkled : 3 purple wrinkled : 3 white round : 1 purple round
b. 9 purple round : 3 purple wrinkled : 3 white round : 1 white wrinkled
c. All purple round
d. 3 purple round : 1 white wrinkled
e. 3 purple round : 3 purple wrinkled : 1 white round : 1 white wrinkled