Arrange the following events of meiosis in the correct sequence -
A. Terminalisation of chiasmata
B. Crossing over
C. Synapsis
D. Disjunction of chromosomes
E. Dissolution of synaptonemal complex
The correct sequence is -

Options

A. `AtoBtoCtoDtoE`
B. `EtoDtoCtoBtoA`
C. `CtoBtoDtoEtoA`
D. `CtoBtoEtoAtoD`

Answer

To arrange the events of meiosis in the correct sequence, we need to understand the stages of meiosis and the specific events that occur during those stages. Here’s the step-by-step solution:

1. **Identify the stages of meiosis**: Meiosis consists of two main divisions: Meiosis I and Meiosis II. The key stages in Meiosis I include leptotene, zygotene, pachytene, diplotene, and diakinesis.

2. **List the events and their corresponding stages**:
- **C. Synapsis** occurs during the **zygotene** stage, where homologous chromosomes pair up.
- **B. Crossing over** occurs during the **pachytene** stage, where genetic material is exchanged between homologous chromosomes.
- **E. Dissolution of synaptonemal complex** occurs during the **diplotene** stage, where the synaptonemal complex that holds the homologous chromosomes together begins to break down.
- **A. Terminalisation of chiasmata** occurs in the **diakinesis** stage, where the chiasmata (points of crossing over) move to the ends of the chromosomes.
- **D. Disjunction of chromosomes** occurs at the end of meiosis, specifically during anaphase of Meiosis I, where homologous chromosomes are pulled apart.

3. **Arrange the events in order**:
- Start with **C (Synapsis)** in the zygotene stage.
- Next is **B (Crossing over)** in the pachytene stage.
- Then, **E (Dissolution of synaptonemal complex)** in the diplotene stage.
- Followed by **A (Terminalisation of chiasmata)** in the diakinesis stage.
- Finally, **D (Disjunction of chromosomes)** occurs.

4. **Final sequence**: The correct order is C, B, E, A, D.

### Final Answer:
The correct sequence is: **C, B, E, A, D**.