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NEETZoologyPrinciples of Inheritance and Variation

Match List-I with List-II regarding the blood groups of parents and their possible progeny. List-I (Parental cross) List-II (Possible blood groups of progeny) (A) Parents with blood groups A and B having a child with blood group O (I) A and B only (B) One parent with blood group AB and the other with blood group O (II) B and O only (C) Homozygous parent with blood group A and heterozygous parent with blood group B (I

Options

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

Correct answer

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

Step-by-step solution

Let us evaluate each parental cross to determine the possible blood groups of the progeny: (A) Parents with blood groups A and B having a child with blood group O (genotype ii ) must both be heterozygous. Their genotypes are I^A i and I^B i . The possible progeny genotypes are I^A I^B (AB), I^A i (A), I^B i (B), and ii (O). Thus, (A) matches (III). (B) One parent with blood group AB ( I^A I^B ) and the other with blood group O ( ii ). The gametes produced are ( I^A , I^B ) and ( i ). The possible progeny genotypes

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