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NEETZoologyPrinciples of Inheritance and Variation

What was the ratio of round to wrinkled seed shapes in the F2 generation?

Options

  1. A1:1
  2. B2:1
  3. C3:1
  4. D4:1

Correct answer

C. 3:1

Step-by-step solution

The genotype of the parents can then be written as RRYY and rryy. The cross between the two plants can be written down as in Figure 4.7 showing the genotypes of the parent plants. The gametes RY and ry unite on fertilization to produce the F1 hybrid RrYy. When Mendel self hybridized the F1 plants he found that 3/4th of F2 plants had yellow seeds and 1/4th had green. The yellow and green color is segregated in a 3:1 ratio. Round and wrinkled seed shape also segregated in a 3:1 ratio ; just like in a monohybrid cross

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