Multiple Choice
Sister chromatids of each chromosome in a cell are separated to opposite poles during which phase of mitosis?
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16. Cell Division
Mitosis
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What happens to the nucleus during prophase II of meiosis?
A
The nucleus doubles in size
B
The nuclear envelope breaks down
C
The nucleus divides into four daughter nuclei
D
The nuclear envelope reforms
Verified step by step guidance1
Understand that prophase II is a stage in meiosis II, which occurs after meiosis I and involves the separation of sister chromatids.
Recall that during prophase II, the nuclear envelope, which surrounds the nucleus, begins to break down to allow the chromosomes to interact with the spindle apparatus.
Note that the nucleus does not double in size or divide into four daughter nuclei during prophase II. These are incorrect descriptions of this stage.
Recognize that the nuclear envelope reforms only during telophase II, not during prophase II. This eliminates the option about the nuclear envelope reforming.
Conclude that the correct event during prophase II is the breakdown of the nuclear envelope, which facilitates the progression of meiosis II.
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