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Multiple Choice
Which statement accurately compares what happens in metaphase and anaphase during mitosis?
A
In metaphase, sister chromatids separate, while in anaphase, chromosomes align at the cell equator.
B
In metaphase, chromosomes align at the cell equator, while in anaphase, sister chromatids separate and move to opposite poles.
C
In metaphase, the nuclear envelope breaks down, while in anaphase, the nuclear envelope reforms.
D
In metaphase, the cell begins cytokinesis, while in anaphase, the cell completes cytokinesis.
Verified step by step guidance
1
Understand the stages of mitosis: Mitosis is divided into several phases, including prophase, metaphase, anaphase, and telophase. Each phase has distinct events that contribute to cell division.
Focus on metaphase: During metaphase, chromosomes align at the cell equator. This alignment is crucial for ensuring that each daughter cell receives an identical set of chromosomes.
Examine anaphase: In anaphase, the sister chromatids separate and move toward opposite poles of the cell. This separation is facilitated by the shortening of spindle fibers attached to the chromatids.
Compare metaphase and anaphase: The key difference is that metaphase involves the alignment of chromosomes at the equator, while anaphase involves the separation of sister chromatids.
Clarify misconceptions: The nuclear envelope does not break down in metaphase nor reform in anaphase; these events are associated with prophase and telophase, respectively. Cytokinesis begins after anaphase, during telophase.