Q15

In a plant species, red flower colour (R) is dominant over white flower colour (r). Two plants of known genotype for flower colour were crossed. A punnet square was used to determine the proportion of genotypes expected in the offspring. Part of the punnet square is shown.
Which statement is true for the parents in this cross?
A. Both parents were homozygous.
B. Both parents were heterozygous.
C. Both parents had flowers of the same colour.
D. Parent 2 must have red flowers and Parent 1 must have white flowers.