What happens during the Prophase and Metaphase stages of mitosis?
Understand the Problem
The question is discussing the stages of mitosis, specifically focusing on the phases of Prophase and Metaphase, explaining what happens in each stage and the role of various cellular structures.
Answer
In prophase, chromosomes condense and nucleolus disappears; in metaphase, chromosomes align at the cell’s equator.
During prophase, the nucleolus disappears, chromatin condenses into chromosomes, the nuclear membrane disintegrates, and spindle fibers begin to form as centrioles move apart. In metaphase, chromosomes align at the metaphase plate, and spindle fibers attach to the kinetochores of each chromosome's centromere.
Answer for screen readers
During prophase, the nucleolus disappears, chromatin condenses into chromosomes, the nuclear membrane disintegrates, and spindle fibers begin to form as centrioles move apart. In metaphase, chromosomes align at the metaphase plate, and spindle fibers attach to the kinetochores of each chromosome's centromere.
More Information
Prophase is the first stage of mitosis where chromosomes become visible. Metaphase is crucial for ensuring chromosomes will be properly divided.
Tips
Common mistakes include confusing chromatid separation with metaphase events. Remember, chromatids separate during anaphase.
Sources
- Phases of mitosis | Mitosis | Biology (article) - Khan Academy - khanacademy.org
- The Events of M Phase - The Cell - NCBI Bookshelf - ncbi.nlm.nih.gov
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