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Questions and Answers
Match the following phases of cell division with their descriptions:
Match the following phases of cell division with their descriptions:
Prophase = The nucleoli also disappears Metaphase = The centromeres become attached to the spindle Anaphase = It is over when the chromatids stop moving and are gathered at each end of the cell Telophase = The nucleolus reforms
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Study Notes
Prophase
- Duplicated chromosomes condense, making them visible.
- Centrioles migrate to opposite poles of the nucleus.
- Formation of the spindle apparatus occurs.
- DNA strands connect at points called centromeres.
- The nuclear envelope disintegrates, allowing microtubules access to chromosomes.
- Nucleoli disappear, signaling the preparation for cell division.
Metaphase
- Centromeres of duplicated chromosomes align at the cell's equatorial plane.
- Spindle fibers attach to the centromeres, anchoring chromosomes for separation.
Anaphase
- Sister chromatids separate as the spindle fibers pull them to opposite ends of the cell.
- Process concludes when chromatids, now individual chromosomes, are gathered at each pole.
Telophase
- Chromosomes de-condense, becoming less visible again.
- The spindle apparatus disassembles as the cell prepares to divide.
- The nuclear envelope reforms around each set of chromosomes at the poles.
- Nucleoli reappear, restoring the cellular environment for normal function.
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