NEETBotanyCell Cycle and Cell Division
Arrange the following events of Prophase I of meiosis in their correct chronological order: (A) Recognition of X-shaped chiasmata (B) Compaction of chromosomes (C) Appearance of recombination nodules (D) Assembly of meiotic spindle (E) Formation of synaptonemal complex Choose the correct sequence from the options given below:
Options
- A(B), (C), (E), (A), (D)
- B(B), (E), (A), (C), (D)
- C(B), (E), (C), (D), (A)
- D(B), (E), (C), (A), (D)
Correct answer
D. (B), (E), (C), (A), (D)
Step-by-step solution
The correct chronological order of the stages of Prophase I is Leptotene Zygotene Pachytene Diplotene Diakinesis. 1. Leptotene: Compaction of chromosomes continues throughout this stage (B). 2. Zygotene: Homologous chromosomes start pairing together, accompanied by the formation of the synaptonemal complex (E). 3. Pachytene: This stage is characterised by the appearance of recombination nodules, the sites at which crossing over occurs (C). 4. Diplotene: The synaptonemal complex dissolves, and the recombined homolog