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The following statements describe events...

The following statements describe events during the mitotic cell cycle. What is the correct of these events in the mitotic cell cycle ?
I. chromosomes migrated to opposite poles of the spindle.
II. Chromosomes arrange themselves at the equator of the spindle.
III. Chromosomes condense and the number membrane disappears .
IV. Centromeres divide.

A

`II rarrIII rarrIVrarrI`

B

`III rarrIIrarrIVrarrI`

C

`III rarrIVrarrIIrarrI`

D

`IVrarrIIrarrIrarrIII`

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct order of events during the mitotic cell cycle based on the provided statements, we need to analyze each statement and identify which phase of mitosis they correspond to. The phases of mitosis are Prophase, Metaphase, Anaphase, and Telophase. 1. **Statement I: Chromosomes migrated to opposite poles of the spindle.** - This event occurs during **Anaphase**. In this phase, sister chromatids are pulled apart and move towards opposite poles of the cell. 2. **Statement II: Chromosomes arrange themselves at the equator of the spindle.** - This event occurs during **Metaphase**. In this phase, chromosomes line up at the metaphase plate (equator) of the spindle apparatus. 3. **Statement III: Chromosomes condense and the nuclear membrane disappears.** - This event occurs during **Prophase**. During prophase, chromosomes become visible as they condense, and the nuclear envelope breaks down. 4. **Statement IV: Centromeres divide.** - This event also occurs during **Anaphase**. The centromeres split, allowing the sister chromatids to separate and move towards opposite poles. Now, let's arrange these statements in the correct order according to the phases of the mitotic cell cycle: - **Prophase** (Statement III) - **Metaphase** (Statement II) - **Anaphase** (Statements I and IV) - **Telophase** (not mentioned in any of the statements) Thus, the correct order of events is: 1. III (Prophase) 2. II (Metaphase) 3. IV (Anaphase) 4. I (Anaphase) ### Final Order: - III → II → IV → I ### Conclusion: The correct sequence of events in the mitotic cell cycle is: **III, II, IV, I**.
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