Meiosis I and Meiosis II are characterised by the separation of,

Options

A. homologous chromosomes, sister chromatids
B. sister chromatids, homologous chromosomes
C. centromere, telomere
D. telomere, centromere

Explanation

To answer the question regarding the separation that occurs during Meiosis I and Meiosis II, we can break it down into clear steps:

### Step-by-Step Solution:

1. **Understanding Meiosis**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the formation of four haploid cells from one diploid cell. It consists of two main stages: Meiosis I and Meiosis II.

2. **Meiosis I**: In Meiosis I, the key event is the separation of homologous chromosomes. Homologous chromosomes are pairs of chromosomes (one from each parent) that are similar in shape, size, and genetic content. During this stage, these homologous chromosomes align and then are pulled apart into two different cells. This process is also known as reduction division because it reduces the chromosome number from diploid (2n) to haploid (n).

3. **Tetrad Formation**: Before the separation occurs, homologous chromosomes undergo a process called synapsis, where they pair up to form a tetrad (a structure containing four chromatids). This is crucial for genetic recombination, which increases genetic diversity.

4. **Meiosis II**: In Meiosis II, the focus shifts to the sister chromatids. After Meiosis I, each of the two cells formed contains two sister chromatids for each chromosome. During Meiosis II, these sister chromatids are separated and pulled to opposite poles of the cell, resulting in four haploid gametes.

5. **Conclusion**: Therefore, to summarize:
- **Meiosis I** is characterized by the separation of homologous chromosomes.
- **Meiosis II** is characterized by the separation of sister chromatids.

### Final Answer:
- Meiosis I: Separation of homologous chromosomes.
- Meiosis II: Separation of sister chromatids.