Question

Two pink-flowering plants are crossed. The offspring percentages are 25% red, 25% white and 50% pink. What would the parent's genotypes be?
A. both homozygous dominant
B. both homozygous recessive
C. both heterozygous
D. one homozygous dominant, one homozygous recessive

Answer 1

The correct answer for your question is c

Answer 2

When red crosses with white flowers to give pink flowers, we are looking at incomplete dominance, i.e. the offspring is a blend (pink) of the parents' characteristics (red or white).

Since we're given in the question two pink flowers crossed to give 25% red, 25% whit and 50% pink, we would be thinking of a punnett square between RW and RW, to give

RR RW

RW WW

Since both parents are RW, that makes both parents heterozygous.