NEET · Biology · STD 11 - 10. Cell cycle and cell division
Arrange the following events of meiosis in correct sequence
\((i)\) Crossing over
\((ii)\) Synapsis
\((iii)\) Terminalisation of chiasmata
\((iv)\) Disappearance of nucleolus
- A \((i), (ii), (iii), (iv)\)
- B \((ii), (iii), (iv), (i)\)
- C \((ii), (i), (iv), (iii)\)
- D \((ii), (i), (iii), (iv)\)
Answer & Solution
Correct Answer
(D) \((ii), (i), (iii), (iv)\)
Step-by-step Solution
Detailed explanation
(d) : Prophase-I of meiosis has been divided into five sub stages which occur in the sequence as : Leptotene Zygotene Pachytene Diplotene Diakinesis. Synapsis \(i.e.\), pairing of homologous chromosomes occurs during zygotene. Crossing over \(i.e.\), exchange of chromatid segments occurs during pachytene. Terminalisation of chiasmata \(i.e.\), shifting of chiasmata towards the ends of chromosomes and complete disappearance ofnucleolus take place during diakinesis.
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