Question

During oogenesis, the primary oocyte remains arrested in:

• A. Metaphase-II
• B. Prophase-I
• C. Anaphase-I
• D. Telophase-II

Hint:

Remember: \[ \text{Primary oocyte} \rightarrow \text{Prophase-I arrest} \] \[ \text{Secondary oocyte} \rightarrow \text{Metaphase-II arrest} \]

Answer 1

The Correct Option is B

Concept: Oogenesis is the process of formation of female gametes.

Step 1: Understand primary oocyte formation. During fetal life:

• Oogonia divide mitotically
• They form primary oocytes

Step 2: Identify arrest stage. Primary oocytes begin meiosis-I but get arrested at: \[ \text{Prophase-I} \] specifically in diplotene stage.

Step 3: Understand completion. The arrested oocyte resumes meiosis only after puberty during ovulation. Therefore, the correct answer is: \[ \boxed{\text{Prophase-I}} \]