At which stage of mitosis are the centrosomes positioned at opposite poles of the cell?
Understand the Problem
The question is asking about the stage of mitosis where centrosomes, which are organelles involved in cell division, reach opposite ends (poles) of the cell. Understanding mitosis stages (prophase, prometaphase, metaphase, anaphase, telophase) is needed to determine when this specific event occurs.
Answer
Metaphase
During metaphase, the centrosomes are positioned at opposite poles of the cell. This is when the mitotic spindle is fully developed and the chromosomes align at the metaphase plate.
Answer for screen readers
During metaphase, the centrosomes are positioned at opposite poles of the cell. This is when the mitotic spindle is fully developed and the chromosomes align at the metaphase plate.
More Information
The centrosomes begin moving towards opposite poles during prophase. By metaphase, they have reached these poles, ensuring proper segregation of chromosomes.
Tips
A common mistake is confusing prophase with metaphase. Centrosomes start migrating during prophase but are not fully at opposite poles until metaphase.
Sources
- Mitosis | Learn Science at Scitable - Nature - nature.com
- Cell Division: Stages of Mitosis | Learn Science at Scitable - Nature - nature.com
- 1.4: Mitosis - Biology LibreTexts - bio.libretexts.org
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