Read Assertion and Reason and select correct option :
Assertion (A): All members of bee society are diploid except the drones.
Reason (R): Drones are produced parthenogenetically.

Question

Accepted Answer

Assertion (A) states that all members of bee society are diploid except the drones. This is true because in bee societies, the queen and worker bees are diploid, meaning they have two sets of chromosomes. Drones, on the other hand, are haploid, having only one set of chromosomes.

Reason (R) states that drones are produced parthenogenetically. This is also true. Parthenogenesis is a form of asexual reproduction where an egg develops into an individual without fertilization. In bees, drones are produced from unfertilized eggs, which is why they are haploid.

Now, let's justify why Option 1 is correct:

1. Both A and R are true: As explained, the assertion that all members of bee society are diploid except the drones is true, and the reason that drones are produced parthenogenetically is also true.

2. R is the correct explanation of A: The reason directly explains why drones are not diploid. Since drones are produced parthenogenetically from unfertilized eggs, they have only one set of chromosomes, making them haploid. This directly supports the assertion that drones are the exception in the bee society's diploid nature.

Explanation of why other options are incorrect:

2. Both A and R are true but R is not the correct explanation of A: This option is incorrect because R is indeed the correct explanation for A. The parthenogenetic production of drones is precisely why they are haploid, unlike the diploid queen and worker bees.

3. A is true but R is false: This option is incorrect because R is true. Drones are produced parthenogenetically, which is a well-established fact in bee biology.

4. A and R are false: This option is incorrect because both A and R are true. The assertion about the diploid nature of bee society members, except for drones, is accurate, and the reason regarding parthenogenetic production of drones is also factual.

In conclusion, Option 1 is the correct answer because both the assertion and the reason are true, and the reason provides the correct explanation for the assertion.