CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When does crossing over occur?
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Interphase
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Prophase 1
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Prophase 2
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Metaphase 1
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Explanation:
Detailed explanation-1: -Crossing over is an enzyme-mediated process, where the exchange of genetic material between non-sister chromatids of homologous chromosomes takes place. It occurs at the pachytene stage of prophase I of meiosis.
Detailed explanation-2: -Crossing over occurs during the pachytene stage of prophase in meiosis, however the chiasma are visible during. No worries!
Detailed explanation-3: -Crossovers between homologous chromatids can be visualized in structures known as chiasmata, which appear late in prophase I (Figure 4). Chiasmata are essential for accurate meioses.
Detailed explanation-4: -During meiosis, crossing-over occurs at the pachytene stage, when homologous chromosomes are completely paired.
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