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NEET BIOLOGYMedium

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): In honey bee population, sons do not have fathers but have grandfathers. Reason (R): Haploidy in drones of honey bee is due to parthenogenesis while fertilisation results into female bees.

In the light of the above statements, choose the correct answer from the options given below:

A

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

B

Both (A) and (R) are True but (R) is not the correct explanation of (A).

C

(A) is True but (R) is False.

D

(A) is False but (R) is True.

Step-by-Step Solution

, honey bees follow a haplodiploid sex-determination system.

  • Reason is True: An unfertilised egg develops as a male (drone) by means of parthenogenesis (haploid), while union of a sperm and an egg (fertilisation) develops into a female (diploid) .
  • Assertion is True: Since males (drones) develop from unfertilised eggs, they have no father. However, the female parent (queen) developed from a fertilised egg, meaning she had a father. Therefore, the drone has a grandfather .
  • Link: The reason (parthenogenesis causing haploidy and lack of father) correctly explains why sons have no fathers but have grandfathers (ancestry via the mother).
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