In meiosis, crossing over and exchange of genetic material between homologous chromosomes are catalyzed by the enzyme:
Phosphorylase
Recombinase
Transferase
Polymerase
crossing over occurs during the pachytene stage of prophase I in meiosis. It is described as 'the exchange of genetic material between two homologous chromosomes'. The text explicitly states that 'Crossing over is also an enzyme-mediated process and the enzyme involved is called recombinase' .
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