Arrange the chromosomal events of meiosis in correct sequence:
List:
I) Disappearing of nucleolus
II) Appearance of recombination nodule on chromatids
III) Terminalisation of chiasmata
IV) Pairing of chromosomes
V) Dissolution of synaptonemal complex
List:
I) Disappearing of nucleolus
II) Appearance of recombination nodule on chromatids
III) Terminalisation of chiasmata
IV) Pairing of chromosomes
V) Dissolution of synaptonemal complex
Show Hint
- II, III, IV, I, V
- I, V, II, IV, III
- IV, III, II, V, I
- IV, II, V, III, I
The Correct Option is D
Solution and Explanation
Step 1: IV - Pairing of chromosomes (synapsis begins in zygotene)
Step 2: II - Appearance of recombination nodule (in pachytene, where crossing over begins)
Step 3: V - Dissolution of synaptonemal complex (in diplotene)
Step 4: III - Terminalisation of chiasmata (during diakinesis)
Step 5: I - Disappearance of nucleolus (prepares for metaphase I)
Thus, the correct sequence is IV, II, V, III, I.
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