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NEETZoologyPrinciples of Inheritance and Variation

Match List I with List II regarding Mendelian crosses in pea plants. List I (Cross) List II (Expected Ratio) (A) Heterozygous Tall Homozygous Dwarf (I) 3 Tall : 1 Dwarf (B) Heterozygous Tall Heterozygous Tall (II) All Tall (C) Homozygous Tall Homozygous Dwarf (III) 1 Tall : 1 Dwarf (D) Homozygous Tall Heterozygous Tall (IV) 1 Homozygous Tall : 1 Heterozygous Tall Choose the correct answer from the options given below

Options

  1. A(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
  2. B(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
  3. C(A)-(III), (B)-(I), (C)-(II), (D)-(IV)
  4. D(A)-(II), (B)-(I), (C)-(III), (D)-(IV)

Correct answer

C. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)

Step-by-step solution

Let us evaluate each cross: (A) Heterozygous Tall ( Tt ) Homozygous Dwarf ( tt ): This is a test cross. It yields 50 % Tall ( Tt ) and 50 % Dwarf ( tt ) plants. The phenotypic ratio is 1 Tall : 1 Dwarf. So, (A) matches with (III). (B) Heterozygous Tall ( Tt ) Heterozygous Tall ( Tt ): This is a monohybrid cross between two heterozygotes. It yields 75 % Tall and 25 % Dwarf plants. The phenotypic ratio is 3 Tall : 1 Dwarf. So, (B) matches with (I). (C) Homozygous Tall ( TT ) Homozygous Dwarf ( tt ): This cross yields

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