Two features present in meiosis but absent in mitosis are

Options

A. Pairing of non-homologous chromosomes
B. Pairing of homologous chromosomes and recombination between them
C. Replication of chromosome
D. All of these

Answer

To answer the question about the two features present in meiosis but absent in mitosis, we can follow these steps:

### Step 1: Understand the Processes
Meiosis and mitosis are two types of cell division. Mitosis results in two identical daughter cells, while meiosis results in four genetically diverse daughter cells.

### Step 2: Identify Key Features of Meiosis
In meiosis, there are specific processes that do not occur in mitosis. The two main features that stand out are:
1. **Pairing of Homologous Chromosomes**: During prophase I of meiosis, homologous chromosomes (one from each parent) pair up in a process called synapsis. This does not occur in mitosis.
2. **Recombination (Crossing Over)**: While homologous chromosomes are paired, they can exchange genetic material through a process called crossing over, leading to genetic variation. This recombination is unique to meiosis.

### Step 3: Compare with Mitosis
In mitosis:
- Chromosomes do not pair with homologous partners.
- There is no crossing over or recombination, as mitosis aims to produce identical cells.

### Conclusion
The two features present in meiosis but absent in mitosis are:
1. Pairing of homologous chromosomes.
2. Recombination (crossing over) between homologous chromosomes.