In meiosis crossing over is initiated at:
Diplotene
Pachytene
Leptotene
Zygotene
Explanation:
Leptotene - Condensation of Chromatin. Zygotene - Synapsis. Diplotene - Terminalisation.
Leptotene - Condensation of Chromatin. Zygotene - Synapsis. Diplotene - Terminalisation.