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NEET BIOLOGYMedium

Arrange the following events of meiosis in a correct sequence: I. Crossing over II. Synapsis III. Terminalisation of chiasmata IV. Disappearance of nucleolus

A

II, I, IV, III

B

II, I, III, IV

C

I, II, III, IV

D

II, III, IV, I

Step-by-Step Solution

The correct sequence of events during Prophase I of Meiosis is:

  1. Synapsis (II): Occurs during the Zygotene stage, where chromosomes start pairing together.
  2. Crossing over (I): Occurs during the Pachytene stage, involving the exchange of genetic material.
  3. Terminalisation of chiasmata (III): Occurs during Diakinesis, where chiasmata shift towards the ends of the chromosomes.
  4. Disappearance of nucleolus (IV): Happens by the end of Diakinesis, marking the transition to Metaphase I, , .
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