Assertion : A gamete contains a single allele for each trait.
Reason : During gametogenesis, the two alleles of each trait segregate, on passing into each gamete at random.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that a gamete contains a single allele for each trait.
- This is true because gametes are produced through meiosis, which reduces the chromosome number by half, resulting in haploid cells. Each gamete therefore carries only one allele for each trait.

2. **Understanding the Reason**:
- The reason provided states that during gametogenesis, the two alleles of each trait segregate randomly into each gamete.
- This is also true. According to Mendel's Law of Segregation, during the formation of gametes, the two alleles for a trait separate so that each gamete receives only one allele.

3. **Linking Assertion and Reason**:
- The assertion is that a gamete contains a single allele for each trait, and the reason explains why this is the case: because the alleles segregate during gametogenesis.
- Since the reason accurately explains the assertion, we can conclude that both the assertion and the reason are true, and the reason is a correct explanation of the assertion.

4. **Conclusion**:
- Therefore, both the assertion and the reason are true, and the reason correctly explains the assertion.

### Final Answer:
- Both the assertion and reason are true, and the reason is the correct explanation for the assertion.