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The enzyme recombinase is required at wh...

The enzyme recombinase is required at which stage of meiosis

A

Pachytene

B

Zygotene

C

Diplotene

D

Diakinesis

Text Solution

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The correct Answer is:
A
Crossing over is an enzymatic process occuring during the pachytene stage of prophase -I. The enzyme involved in this process is called recombinase which aids in the recombination of genes between homologous chromosomes.
During zygotene stage, homologous chromosomes pair up by a process called synapsis and form a complex bivalent structure. Diplotene is marked by the dissolution of synaptonemal complex and chaisma formation. While diakinesis is marked by terminalisation of chiasmata (i.e. chiasmata shifts towards periphery of chromosome).
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