Crossing over occurs during which stage of meiosis?
Answer and explanation
Correct answer: C. Prophase I
- Step 1: Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes.
- Step 2: This recombination process occurs during the pachytene sub-stage of Prophase I in meiosis, mediated by the enzyme recombinase.
Answer
Prophase I.
Why not the others: 'Metaphase I' is the stage where bivalent homologous pairs align at the equatorial plate; 'Anaphase II' involves the separation of sister centromeres; 'Telophase II' is the final stage resulting in four haploid nuclei.
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