In which phase of cell division are oogonia arrested
(A) Anaphase II
(B) Anaphase I
(C) Interphase
(D) Both A and B

Options

A. Anaphase II
B. Anaphase I
C. Interphase
D. Both A and B

Answer

To determine in which phase of cell division oogonia are arrested, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Oogonia**: Oogonia are the precursor cells that develop into oocytes (egg cells) in females. They undergo mitosis to increase in number before entering meiosis.

2. **Formation of Primary Oocytes**: Before birth, oogonia develop into primary oocytes. This process occurs during fetal development.

3. **Meiosis Arrest**: The primary oocytes are diploid and enter meiosis. However, they do not complete meiosis immediately. Instead, they get arrested in a specific phase.

4. **Identifying the Arrest Phase**: The primary oocytes are arrested in prophase I of meiosis until puberty. This means they do not progress further in meiosis until the female reaches reproductive maturity.

5. **Correct Phase Identification**: The question asks for the phase of cell division where oogonia are arrested. Since they are arrested in meiosis I, and specifically at the stage of prophase I, we need to determine if any of the options provided correspond to this.

6. **Evaluating the Options**:
- (A) Anaphase II: This is incorrect because the primary oocytes have not reached meiosis II.
- (B) Anaphase I: This is also incorrect because they are arrested in prophase I, not anaphase I.
- (C) Interphase: This is incorrect as well since they are not in interphase; they are in the meiotic process.
- (D) Both A and B: This is incorrect as neither A nor B is correct.

7. **Conclusion**: Since none of the options directly mention prophase I, the correct answer is not listed among the choices provided. However, if we consider the context, the primary oocytes are arrested in meiosis I, specifically in prophase I.

### Final Answer:
None of the options (A, B, C, D) accurately describe the phase of arrest for oogonia. They are arrested in prophase I of meiosis.