The color of the petals in a carnation is determined by an incomplete dominance pattern. The Punnett square is used to determine the genotypes of the offspring of a homozygous red (RR) and a homozygous white (rr) carnation.
According to the Punnett square, what color of petals could result from the pairing of these plants?
A.
only red flowers
B.
only pink flowers
C.
white and red flowers
D.
red and pink flowers
Answer explanation
C. white and red flowers
Explanation: In incomplete dominance, the heterozygous genotype (Rr) results in a blending of the two traits. In this case, the red and white colors blend to create pink petals. This means that the offspring of a homozygous red carnation (RR) and a homozygous white carnation (rr) will result in a 1:1 ratio of red and white flowers.