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NEETZoologyPrinciples of Inheritance and Variation

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In honeybees, male drones produce sperms by mitosis rather than meiosis. Reason (R): Drones develop parthenogenetically from unfertilized eggs and possess a haploid set of chromosomes. In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
  2. BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
  3. C(A) is correct but (R) is not correct
  4. D(A) is not correct but (R) is correct

Correct answer

A. Both (A) and (R) are correct and (R) is the correct explanation of (A)

Step-by-step solution

Assertion (A) is correct because male honeybees (drones) produce sperms through mitosis. Reason (R) is also correct and provides the correct explanation for (A). Drones develop from unfertilized eggs via parthenogenesis, meaning they are haploid. Since their cells already contain only one set of chromosomes, they cannot undergo reductional division (meiosis) to form gametes. Therefore, gametogenesis must occur via mitosis. Thus, both (A) and (R) are correct and (R) correctly explains (A). Answer: Both (A) and (R) a

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