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NEST2013BiologyPrinciples of Inheritance and Variation

In order to improve local cattle breeds in India, male cattle were procured from Australia. All imported male cattle had white skin (genotype bb). These were further bred with indigenous Indian female cattle having black skin (genotype B B or B b ). It was found that approximately 25 % cattle of the F1 generation died soon after birth due to heart defects. The heart defects were found to be associated with either of

Options

  1. AGenotype of Indian breed is (B B D D Z Z) and Australian breed is (b b D D Z z) where gene B and D are linked
  2. BGenotype of Indian breed is (B B D D z z) and Australian breed is (b b D D z z) where gene B and D are linked
  3. CGenotype of Indian breed is (B B D D Z z) and Australian breed is (b b D D Z z) where gene B and D are linked
  4. DGenotype of Indian breed is (BBddZZ) and Australian breed is ( b b D d Z Z ) where gene B and D are linked gen

Correct answer

C. Genotype of Indian breed is (B B D D Z z) and Australian breed is (b b D D Z z) where gene B and D are linked

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