Identify the correct representation from which dihybrid F₂ phenotypic ratio can be derived

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1 : 3 (Round : Wrinkled) x 1 : 3 (yellow : green)

2 : 1 (Round : Green) x 3 : 1 (yellow : wrinkled)

3 : 1 (Round : Wrinkled) x 3 : 1 (yellow : green)

3 : 1 (Round : Yellow) x 3 : 1 (wrinkled : green)

answer is C.

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Detailed Solution

NCERT Page No.64

A dihybrid cross is between plants differing in two traits)

the phenotypes

round, yellow;

wrinkled, yellow;

round, green and

wrinkled, green appeared in the ratio 9:3:3:1.Such a ratio was observed for several pairs of characters that Mendel studied.
The ratio of 9:3:3:1 can be derived as a combination series of

3 yellow: : 1 green, 3 round : 1 wrinkled.

This derivation can be written as follows:
(3 Round : 1 Wrinkled) (3 Yellow : 1 Green) = 9 Round, Yellow : 3 Wrinkled, Yellow: 3 Round, Green : 1 Wrinkled, Green

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