Textbook Question
In the light micrograph below of dividing cells near the tip of an onion root, identify a cell in interphase, prophase, metaphase, anaphase, and telophase. Describe the major events occurring at each stage.
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3. Energy & Cell Processes
Phases of Mitosis
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In which phase of mitosis are the chromosomes lined up at the cell's equatorial plane?
A
Metaphase
B
Anaphase
C
Prophase
D
Telophase
Verified step by step guidance1
Understand the stages of mitosis: Mitosis is divided into several phases: prophase, metaphase, anaphase, and telophase.
Identify the key characteristics of each phase: In prophase, chromosomes condense and become visible. In metaphase, chromosomes align at the cell's equatorial plane. In anaphase, sister chromatids separate and move to opposite poles. In telophase, the cell prepares to divide as the nuclear envelope re-forms.
Focus on the phase where chromosomes align: During metaphase, the chromosomes are aligned at the cell's equatorial plane, also known as the metaphase plate.
Recognize the role of the spindle apparatus: The spindle fibers attach to the centromeres of the chromosomes during metaphase, ensuring they are properly aligned for separation.
Conclude that the phase where chromosomes are lined up at the equatorial plane is metaphase, based on the characteristics of each mitotic phase.
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