Meiosis is not having the one of the character out of the four given below-

Options

A. It involves two stages of DNA replication, one before meiosis-I and another before meiosis-II
B. It involves recombination and crossing over
C. Sister chromatids separate during anaphase-II
D. Nuclear membrane disappears durring prophase

Answer

To solve the question regarding the characteristics of meiosis, we need to analyze the options provided and determine which one does not apply to meiosis. Here’s a step-by-step breakdown:

### Step 1: Understand Meiosis
Meiosis is a type of cell division that occurs in germ cells and results in four genetically diverse daughter cells, each with half the number of chromosomes of the parent cell. It consists of two main stages: Meiosis I and Meiosis II.

### Step 2: Analyze the Options
We need to evaluate the four characteristics given in the question to identify which one is not true for meiosis.

1. **Membrane disappears during prophase**: This statement is true. During prophase of meiosis, the nuclear membrane breaks down.

2. **Sister chromatids separate during anaphase II**: This statement is also true. In anaphase II, the sister chromatids are pulled apart to opposite poles of the cell.

3. **It involves recombination and crossing over**: This statement is true. Meiosis includes crossing over and recombination during prophase I, where homologous chromosomes exchange genetic material.

4. **It involves two stages of DNA replication**: This statement is false. Meiosis involves only one round of DNA replication that occurs during the interphase before Meiosis I. There is no additional DNA replication before Meiosis II.

### Step 3: Identify the Incorrect Characteristic
From the analysis, the fourth characteristic, "It involves two stages of DNA replication," is not true for meiosis. Therefore, this is the answer to the question.

### Conclusion
The characteristic that meiosis does not have is: **"It involves two stages of DNA replication."**

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