A particular plant can have red or white flowers. Assume that flower color is determined by a single gene and that the allele for red flowers (R) is dominant over the allele for white flowers (r). In a cross between a plant with white flowers and a plant with red flowers, have the offspring have red flowers and half have white flowers. Which cross represents the genotypes of the parent generation? A. RR x rr
B. rr x rr
C. RR x RR
D. Rr x rr
E. Rr X Rr
F. RR x Rr