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NEET2002ZoologyPrinciples of Inheritance and VariationActual

A plant is of F₁ generation with genotype "AABbCC". On selfing of this plant what is the phenotypic ratio in F ₂ generation?

Options

  1. A3: 1
  2. B1: 1
  3. C9: 3: 3: 1
  4. D27: 9: 9: 9: 3: 3: 3: 1

Correct answer

A. 3: 1

Step-by-step solution

The genotype of F₁ generation is AABbCC Number of gametes that are obtained by crossing can be obtained by formula =2^n (where n represents the number of heterozygous gametes) Thus, the number of heterozygous gametes =2^1=2 2 gametes formed are: ABC and AbC . On self crossing F₁ generation, the phenotypes that are formed in F ₂ generation are in the ratio of 3: 1

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