question_answer

In Mirabilis a hybrid for red (RR) and white (rr) flower produces pink (Rr) 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. The ratio of Pink and White flowers will be 1 : 1.