Question

Arrange the meiotic stages in correct sequence.

• A. II, IV, III, I
• B. II, I, II, IV
• C. III, II, IV, I
• D. I, III, IV, I

Hint:

Zygotene \(\rightarrow\) Synapsis, Pachytene \(\rightarrow\) Crossing over, Metaphase-I \(\rightarrow\) Alignment, Anaphase-II \(\rightarrow\) Chromatid separation.

Answer 1

The Correct Option is A

Step 1: Pairing of homologous chromosomes.
Occurs during: \[ \text{Zygotene} \] Thus: \[ II \] comes first.

Step 2: Crossing over.
Occurs during: \[ \text{Pachytene} \] Hence: \[ IV \] comes next.

Step 3: Alignment at equatorial plate.
Occurs in: \[ \text{Metaphase-I} \] Hence: \[ III \]

Step 4: Complete chromatid separation.
Occurs during: \[ \text{Anaphase-II} \] Hence: \[ I \] \[ \boxed{II,\ IV,\ III,\ I} \]