Question:
Identify the correctly matched pairs.
A. Leptotene - Synapsis occurs
B. Zygotene - Pairing of homologous chromosomes
C. Pachytene - Crossing over do not occur
D. Diplotene - Nuclear membrane dissolves
E. Diakinesis - Terminalisation of chiasmata
Identify the correctly matched pairs.
A. Leptotene - Synapsis occurs
B. Zygotene - Pairing of homologous chromosomes
C. Pachytene - Crossing over do not occur
D. Diplotene - Nuclear membrane dissolves
E. Diakinesis - Terminalisation of chiasmata
A. Leptotene - Synapsis occurs
B. Zygotene - Pairing of homologous chromosomes
C. Pachytene - Crossing over do not occur
D. Diplotene - Nuclear membrane dissolves
E. Diakinesis - Terminalisation of chiasmata
Show Hint
Memorise the order: Leptotene → Zygotene (synapsis) → Pachytene (crossing-over) → Diplotene → Diakinesis (terminalisation).
A quick mnemonic: "Let Zebras Paint Dark Doors" to preserve the sequence of events.
Use the stage functions (pairing vs crossing over vs terminalisation) to judge true/false statements.
A quick mnemonic: "Let Zebras Paint Dark Doors" to preserve the sequence of events.
Use the stage functions (pairing vs crossing over vs terminalisation) to judge true/false statements.
Updated On: Mar 6, 2026
- B and E are correct
- B and C are correct
- A and B are correct
- B and D are correct
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Review prophase I sub-stages of meiosis:
Leptotene — chromosomes condense; synapsis (pairing) has not yet occurred (so statement A is false).
Zygotene — homologous chromosomes pair/synapse (statement B is true).
Pachytene — crossing over (genetic recombination) occurs here (so statement C "do not occur" is false).
Diplotene — nuclear membrane is still present; chromosomes begin to separate at chiasmata (statement D is false about membrane dissolving).
Diakinesis — final sub-stage of prophase I; terminalisation of chiasmata and preparation for metaphase occurs (statement E is true).
Thus only B and E are correct → option (1).
Leptotene — chromosomes condense; synapsis (pairing) has not yet occurred (so statement A is false).
Zygotene — homologous chromosomes pair/synapse (statement B is true).
Pachytene — crossing over (genetic recombination) occurs here (so statement C "do not occur" is false).
Diplotene — nuclear membrane is still present; chromosomes begin to separate at chiasmata (statement D is false about membrane dissolving).
Diakinesis — final sub-stage of prophase I; terminalisation of chiasmata and preparation for metaphase occurs (statement E is true).
Thus only B and E are correct → option (1).
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