Which of the following events occur during prophase?I. Centrosome duplicationII. Centrosome movement to the spindle polesIII. Centrosome organization of the spindle apparatusI, II and IIIII and IIII and II I and IIII
Question
Which of the following events occur during prophase?I. Centrosome duplicationII. Centrosome movement to the spindle polesIII. Centrosome organization of the spindle apparatusI, II and IIIII and IIII and II I and IIII
Solution
All of the events listed occur during prophase. So, the answer is "I, II and III".
Here's a step-by-step breakdown:
I. Centrosome duplication: This occurs before prophase begins, during the S phase of the cell cycle. However, the duplicated centrosomes can still be seen in prophase.
II. Centrosome movement to the spindle poles: During prophase, the centrosomes start moving towards opposite ends of the cell, which are called spindle poles.
III. Centrosome organization of the spindle apparatus: The centrosomes also begin to organize the spindle apparatus during prophase. The spindle apparatus is necessary for the movement of chromosomes during cell division.
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