In meiosis, haploid cells are formed. During this process, the nuclear membranes and nucleolus disappear

Options

A. One time
B. two times
C. four times
D. eight times

Answer

To solve the question regarding the disappearance of the nuclear membrane and nucleolus during meiosis, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Meiosis**:
- Meiosis is a type of cell division that results in the formation of haploid cells from a diploid cell. It consists of two sequential divisions known as meiosis I and meiosis II.

**Hint**: Remember that meiosis reduces the chromosome number by half, leading to haploid cells.

2. **Phases of Meiosis**:
- Each meiotic division (meiosis I and meiosis II) has distinct phases, similar to mitosis. The key phases include prophase, metaphase, anaphase, and telophase.

**Hint**: Familiarize yourself with the phases of meiosis and how they correspond to those in mitosis.

3. **Nuclear Membrane and Nucleolus Disappearance**:
- The nuclear membrane and nucleolus disappear during prophase of both meiosis I and meiosis II.
- In meiosis I, during prophase I, the nuclear membrane breaks down as the chromatin condenses into chromosomes.
- In meiosis II, during prophase II, the same process occurs again where the nuclear membrane and nucleolus disappear.

**Hint**: Focus on the prophase stages of both meiotic divisions to determine when these structures disappear.

4. **Counting the Disappearances**:
- Since the nuclear membrane and nucleolus disappear once in prophase I and once in prophase II, they disappear a total of two times during the entire meiosis process.

**Hint**: Keep track of the number of times these events occur in each meiotic division.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the nuclear membranes and nucleolus disappear **two times** during meiosis.

**Final Answer**: The answer is **two times**.