Question

Arrange the steps of mitosis in the correct order.

Answer 1

Answer:

1) Prophase

2) Metaphase

3) Anaphase

4) Telophase

Answer 2

Answer:

Explanation:

Mitosis:

A cell prepares for cell division by replicating its chromosomes, segregating them, and creating two identical nuclei during the mitotic phase. The cell's contents are typically divided equally between two daughter cells with the same genomes after mitosis.

Prophase, prometaphase, metaphase, anaphase, and telophase are these stages. Since cytokinesis is the final physical cell division after telophase, it is occasionally regarded as the sixth stage of mitosis.

Prophase:

Prophase, the first stage of mitosis, sees the recruitment of condensin and the start of the condensation process that lasts until metaphase. In the majority of species, prophase allows the resolution of the individual sister chromatids by mainly removing cohesin from the arms of the sister chromatids. However, the centromere, the region of the chromosome that is the most restricted, retains cohesin. The spindle also starts to form during prophase when the centrosomes shift to their opposing poles and microtubules start to form from the double centrosomes.

Prometaphase:

The abrupt division of the nuclear envelope into several tiny vesicles, which will later be divided between the future daughter cells, marks the start of prometaphase. Spindle assembly requires the breakdown of the nuclear membrane as a necessary step. Animal cells' centrosomes are outside the nucleus, thus until the nuclear membrane separates, the forming spindle's microtubules cannot access the chromosomes.

The cell cycle's prometaphase is one of its most active phases. In search of attachment sites at chromosome kinetochores, which are intricate platelike structures that assemble during prometaphase on one face of each sister chromatid at its centromere, microtubules rapidly build and disintegrate as they extend from the centrosomes.

Metaphase:

Then, during metaphase, when all of the cell's chromosomes align at the spindle's equator, chromosomes reach their most compacted condition. Because chromosomes may be seen most clearly at this stage, metaphase is very helpful in cytogenetics. Furthermore, mitotic poisons like colchicine can experimentally arrest cells at the metaphase. Chromosomes sometimes halt migrating during metaphase, as demonstrated using video microscopy. To a large extent, only cells with appropriately constructed spindles enter anaphase, which is determined by a complicated checkpoint process.

Anaphase:

The sudden separation of sister chromatids indicates that cells are transitioning from metaphase into anaphase. The protease separase's rapid breakdown of the cohesin molecules connecting the sister chromatids is one of the main causes of chromatid separation.

Telophase and Cytokinesis:

Telophase, or the phase in which the chromosomes reach their poles, marks the conclusion of mitosis. The chromosomes then start to decondense into their interphase conformations as the nuclear membrane recovers. Cytokinesis, or the division of the cytoplasm into two daughter cells, occurs after telophase. The daughter cells that are produced as a result of this process share the same genetic makeup.

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