Question

How are 8 ascospores formed in Neurospora?

• A. 3 Mitosis
• B. 1 Mitosis, 1 Meiosis
• C. 2 Mitosis
• D. 1 Meiosis, 1 Mitosis

Hint:

Meiosis followed by mitosis is common in many fungi and ensures genetic diversity while maintaining chromosome number.

Answer 1

The Correct Option is D

Step 1: Understand Neurospora reproduction.
In Neurospora, the formation of ascospores follows a sequence of nuclear divisions. The ascospore formation involves both mitosis and meiosis.
Step 2: Analyze the process.
- First, meiosis occurs, which results in the formation of haploid cells. - Then, mitosis occurs to produce the 8 ascospores, ensuring that each spore has the correct genetic makeup.
Step 3: Conclusion.
Thus, the correct process for forming 8 ascospores is ((D), which involves 1 meiosis followed by 1 mitosis.
Final Answer: \[ \boxed{((D) \; 1 \; Meiosis, \; 1 \; Mitosis} \]