During which stage of cell division does crossing over and genetic recombination occur between non-sister chromatids?

💡 Solution & Explanation

Crossing over and genetic recombination between non-sister chromatids of homologous chromosomes occur during the pachytene stage of prophase I in meiosis, facilitated by the enzyme recombinase. In contrast, leptotene marks the condensation of chromatin, whereas zygotene involves the pairing or synapsis of homologous chromosomes.