question_answer

In Mirabilis a hybrid for red (RR) and white (rr) flower produces pink (R-r) flower. A plant with pink flower is crossed with white flower the expected phenotypic ratio is :

A)  red : pink : white (1 : 2 : 1)

B)  pink : white (1 : 1)

C)  red : pink (1 : 1)

D)  red .-white (3 : 1)

Correct Answer: B

Solution :

Mirabilis jalapa shows incomplete dominance. So, the ratio of pink and white flower will be 1 : 1