question_answer

In sweet pea plants the presence of dominant C and P genes is essential for development of purple colour. The ratio of plants producing flowers of different colours in the progeny of the cross Cc Pp × Cc pp will be [AFMC 1993]

A) 2 white and 6 purple coloured flowers

B) 2 purple and 6 white coloured flowers

C) 3 white and 5 purple coloured flowers

D) 3 purple and 5 white coloured flowers

Correct Answer: D

Solution :

 

	CP	Cp	cP	cp
Cp	CCPp Purple	CCpp White	CcPp Purple	Ccpp White
Cp	CcPp Purple	Ccpp White	ccPp White	ccpp White

Phenotypic ratio- 3 purple : 5 white