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Multiple Choice
Which event occurs during anaphase?
A
Chromosomes align at the cell's equatorial plane.
B
Chromatin condenses into visible chromosomes.
C
The nuclear envelope re-forms around each set of chromosomes.
D
Sister chromatids are pulled apart to opposite poles of the cell.
Verified step by step guidance
1
Understand the context of the question: The question is asking about events that occur during a specific phase of mitosis, which is anaphase.
Recall the stages of mitosis: Mitosis consists of prophase, metaphase, anaphase, and telophase. Each stage has distinct events.
Identify the key event of anaphase: During anaphase, the primary event is the separation of sister chromatids.
Explain the process: Sister chromatids, which are identical copies of a chromosome connected by a centromere, are pulled apart by spindle fibers towards opposite poles of the cell.
Differentiate from other stages: Contrast this with metaphase where chromosomes align at the equatorial plane, and telophase where the nuclear envelope re-forms.