Question

Snapdragons, a flowering plant popular with gardeners, can have red, white, and pink colored petals. When snapdragons with red petals (RR) are crossed with snapdragons having white (rr) petals, the offspring have pink petals. The pink coloration (Rr) is a phenotype in between the red and white parental phenotypes. What is this kind of inheritance pattern called?
A)
classic dominance
B)
bipolar inheritance
C)
incomplete dominance
Eliminate
D)
recessive inheritance

Answer 1

The answer is c, incomplete dominance. The dominate trait of the red petals is their red color. The dominate trait for the white petals is their white color. When their offspring have pink petals, neither parental phenotype trait is dominate over the other. Their colors are equally represented in the pink color of the offspring, which shows incomplete dominance - a case where neither parental phenotype is more visible than the other. The ratio of their colors represented in the offspring is one to one.