The chromosomes of many of the squashed onion root tip cells are plainly visible. In some cells, replicated chromosomes are aligned along the center (equator) of the cell. These particular cells are in which stage of mitosis?
Correct answer: D. Metaphase
- A. Telophase
- B. Prophase
- C. Anaphase
- D. Metaphase
Explanation
The description provided indicates that the replicated chromosomes are aligned along the center (equator) of the cell. This alignment suggests that these cells are in the metaphase stage of mitosis. During metaphase, replicated chromosomes, consisting of two sister chromatids held together at the centromere, align along the metaphase plate (equatorial plate) of the cell.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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