Assertion :- During pachytene crossing over takes place which is dependent on recombinase
Reason:- Recombinase is the group of enzymes involved in crossing over and crossing over is an enzyme dependent process.

Options

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

Answer

To solve the question regarding the assertion and reason, we can follow these steps:

### Step 1: Analyze the Assertion
The assertion states: "During pachytene, crossing over takes place which is dependent on recombinase."
- **Explanation**: Pachytene is a stage in prophase I of meiosis where homologous chromosomes are closely aligned and crossing over occurs. This process is indeed dependent on specific enzymes, including recombinases, which facilitate the exchange of genetic material between homologous chromosomes.

### Step 2: Analyze the Reason
The reason states: "Recombinase is the group of enzymes involved in crossing over and crossing over is an enzyme-dependent process."
- **Explanation**: Recombinases are a class of enzymes that play a crucial role in the process of genetic recombination, including crossing over. This process is enzyme-dependent, as it requires these enzymes to facilitate the breaking and rejoining of DNA strands.

### Step 3: Determine the Relationship Between Assertion and Reason
- Both the assertion and reason are true statements. The reason correctly explains the assertion because it identifies the role of recombinase in the process of crossing over during the pachytene stage.

### Step 4: Conclusion
Based on the analysis, we can conclude that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

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

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