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Multiple Choice
Which of the following events occurs during anaphase of mitosis?
A
The mitotic spindle begins to form.
B
The nuclear envelope re-forms around each set of chromosomes.
C
Chromosomes align at the cell's equatorial plane.
D
Sister chromatids are pulled apart toward opposite poles.
Verified step by step guidance
1
Understand the stages of mitosis: Mitosis is divided into several phases: prophase, metaphase, anaphase, and telophase.
Identify the key event of anaphase: During anaphase, the sister chromatids are separated and pulled toward opposite poles of the cell.
Differentiate anaphase from other phases: In prophase, the mitotic spindle begins to form. In metaphase, chromosomes align at the cell's equatorial plane. In telophase, the nuclear envelope re-forms around each set of chromosomes.
Recognize the role of the mitotic spindle: The spindle fibers attach to the centromeres of the sister chromatids and shorten, pulling the chromatids apart during anaphase.
Conclude the process: The separation of sister chromatids ensures that each daughter cell will receive an identical set of chromosomes, which is crucial for genetic consistency.