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NEETZoologyPrinciples of Inheritance and Variation

In a honeybee colony, a male drone is observed. Based on the haplodiploid sex-determination system, which of the following statements correctly describes the biological lineage of this drone?

Options

  1. AHe has a father and a grandfather, and can have both sons and daughters.
  2. BHe has no father and cannot have sons, but has a grandfather and can have grandsons.
  3. CHe has a father but no grandfather, and can have sons but no grandsons.
  4. DHe has no father and no grandfather, and can only have daughters.

Correct answer

B. He has no father and cannot have sons, but has a grandfather and can have grandsons.

Step-by-step solution

In honeybees, sex determination is based on the haplodiploid system. A male drone develops parthenogenetically from an unfertilized egg laid by the queen. Because he develops from an unfertilized egg, he has a mother but no father. However, his mother (the queen) developed from a fertilized egg, meaning she had both a father and a mother. Therefore, the drone has a grandfather (his mother's father). When the drone reproduces, his sperms can only fertilize eggs to produce diploid females (queens or workers). Thus, h

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