| 1. | Pachytene | 2. | Diplotene |
| 3. | Diakinesis | 4. | Zygotene |
In meiosis crossing over is initiated at
| 1. | leptotene |
| 2. | Zygotene |
| 3. | diplotene |
| 4. | pachytene |
| Column I | Column II | ||
| (a) | pachytene | (1) | pairing of homologous chromosomes |
| (b) | metaphase I | (2) | terminalisation of chiasmata |
| (c) | diakinesis | (3) | crossing-over takes place |
| (d) | zygotene | (4) | chromosomes align at equatorial plate |
| 1. | a-3 b-4 c-2 d-1 |
| 2. | a-1 b-4 c-2 d-3 |
| 3. | a-2 b-4 c-3 d-1 |
| 4. | a-4 b-3 c-2 d-1 |
| 1. | leptotene | 2. | zygotene |
| 3. | diplotene | 4. | pachytene |