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NEETZoologyPrinciples of Inheritance and Variation

In the dihybrid cross, what was the observed phenotypic ratio of round, yellow; wrinkled, yellow; round, green; and wrinkled, green?

Options

  1. A3:1
  2. B1:2:1
  3. C9:3:3:1
  4. D1:1:1:1

Correct answer

C. 9:3:3:1

Step-by-step solution

In the dihybrid cross (Figure 4.7), 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, with 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 Based upon such obser

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