Mitosis differs from meiosis in not having

Options

A. Duplication of DNA
B. Long prophase
C. Interphase
D. Synapsis and crossing over

Answer

To answer the question "Mitosis differs from meiosis in not having," we need to analyze the provided options and understand the key differences between mitosis and meiosis.

**Step 1: Understand Mitosis and Meiosis**
- Mitosis is a type of cell division that results in two daughter cells, each with the same number of chromosomes as the parent cell. It is known as equational division.
- Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four daughter cells. It is known as reductional division.

**Step 2: Analyze the Options**
1. **Duplication of DNA**:
- Both mitosis and meiosis involve DNA duplication during the S phase of interphase. Therefore, this option is incorrect.

2. **Long Prophase**:
- Both mitosis and meiosis have prophase stages, but meiosis has a longer prophase (specifically prophase I) due to the pairing of homologous chromosomes. Thus, this option is also incorrect.

3. **Interphase**:
- Interphase occurs in both mitosis and meiosis, consisting of G1, S, and G2 phases. Therefore, this option is incorrect as well.

4. **Synapsis and Crossing Over**:
- Synapsis (the pairing of homologous chromosomes) and crossing over (the exchange of genetic material between homologous chromosomes) occur only during meiosis, specifically in prophase I. These processes do not occur in mitosis. Thus, this option is correct.

**Conclusion:**
Mitosis differs from meiosis in not having synapsis and crossing over.

**Final Answer:**
Mitosis differs from meiosis in not having synapsis and crossing over.

---