Crossing over takes place between the stages

Leptotene and diplotene

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Pachytene and diplotene

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Zygotene and pachytene

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Zygotene and diplotene

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Solution

The correct option is D Pachytene and diplotene
Prophase 1 is the first stage of meiosis and is divided into five phases, namely Leptotene, Zygotene, Pachytene, Diplotene and Diakinesis. During pachytene, chromosomes condense. Crossing over takes place during this stage and at the end, chiasma is formed between non-sister chromatids of homologous chromosomes.
Thus, the correct answer is 'Pachytene and diplotene'.

Suggest Corrections

	Column I		Column II
A	Leptotene	1	Terminalisation of chiasmata
B	Zygotene	2	Dissolution of the synaptonemal complex
C	Pachytene	3	Crossing over takes place
D	Diplotene	4	Formation of synaptonemal complex
E	Diakinesis	5	Condensation of chromosome