Question
Question: Why is mitosis in animals called astral mitosis?...
Why is mitosis in animals called astral mitosis?
Solution
Mitosis is a stage of the cell cycle in which replicated chromosomes are split into two nuclei. When a cell divides, it produces genetically identical cells with the same number of chromosomes. As a result, equational division is another term for mitosis. Mitosis is generally preceded by the S stage of interphase and is frequently followed by telophase and cytokinesis.
Complete answer:
Mitosis is a kind of cell division in which one cell, which is the mother cell divides to generate two genetically identical new cells or the daughter cells. Mitosis is the step of the cell cycle's division process when the nucleus' DNA is divided into two equal sets of chromosomes.
The animal cell almost doubles in size during the first stage of karyokinesis and often becomes spherical as the cytoplasm grows thicker and more viscous. In both the nucleus and the cytoplasm, many changes occur virtually simultaneously. The centriole divides and travels apart to occupy the cell’s opposite poles. Aster is formed when a large number of delicate microtubules develop around the centrioles, generating star-like formations. As a result, animal cell mitosis is known as astral mitosis.
Prophase, Prometaphase, Metaphase, Anaphase, and Telophase are the five stages of cell division that occur during mitosis. In preparation for mitotic spindle formation, two aster-covered centrosomes move to opposing sides of the nucleus during prophase. The nuclear envelope is fragmented and the mitotic spindles are formed during prometaphase. The kinetochore microtubules that extend from each centrosome attach to the chromosome centromeres during metaphase.
Note:
Mitosis is a process that happens solely in eukaryotic cells. Prokaryotic cells, which do not have a nucleus, divide through a process known as binary fission. Mitosis occurs in a variety of ways in different organisms. Animal cells, for example, go through a "open" mitosis in which the nuclear envelope breaks down before the chromosomes separate, whereas fungi go through a "closed" mitosis in which the chromosomes divide within a cell nucleus that is still intact.