Question

Assertion (A): The two alleles of a gene segregate from each other into the gametes; so half the gametes carry one allele of the pair and the other half carry the other allele. Reason (R): The union of one gamete from each parent to form the zygote is random.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A).
• B. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A).
• C. (A) is correct but (R) is not correct.
• D. (A) is not correct but (R) is correct.

Hint:

Segregation = Making the cards (Gametes); Random Union = Dealing the cards (Fertilisation).

Answer 1

The Correct Option is B

Step 1: Concept
This refers to Mendel's Law of Segregation and the nature of fertilisation.

Step 2: Meaning
Segregation happens during meiosis; union of gametes happens during fertilisation.

Step 3: Analysis
Assertion (A) describes how alleles separate during meiosis. Reason (R) describes that fertilisation is random. Both are true, but the randomness of fertilisation does not explain the mechanism of allele segregation during meiosis.

Step 4: Conclusion
Both are correct, but (R) is not the explanation for (A).

Final Answer: (B)