The enzyme recombinase is required in which stage of meiosis ?

Options

A. Pachytene
B. Zygotene
C. Diplotene
D. Diakinesis

Answer

A

Explanation

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).