Question

what is mitosis? please define the phases of mitosis​

Answer 1

Explanation:

Mitosis, a process of cell duplication, or reproduction, during which one cell gives rise to two genetically identical daughter cells. Strictly applied, the term mitosis is used to describe the duplication and distribution of chromosomes, the structures that carry the genetic information.

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Answer 2

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‍ ‍ ‍ MITOSIS is the division in which one parent cell divides inti two identical daughter cells.

‍ ‍ ‍ The most important aspect of mitosis is that the same normal chromosomes number is maintained at each cell division.

‍ Phrases of Mitosis : Mitosis is completed in two steps : Karyokinesis and Cytokinesis.

Karyokinesis:

‍ ‍ ‍ ‍ ‍ Karyokinesis of mitosis is carried into four main phases. Those are –

• Prophase
• Metaphase
• Anaphase
• Telophase

• Prophase: In this phase the chromosomes are short and thick and are clearly visible inside the nucleus. All the chromosomes are messed up like threads in the nucleus.

A number of fibers appear between the two daughter centrioles, which are called spindle fiber.

• Metaphase: The chromosomes arrange on the equatorial plane. Each chromosomes gets attached to a spindle fiber by its centromere.

• Anaphase: Centromere attaching the two chromatids divides. The two sister chromatids of each chromosomes seperate and are drawn apart towards opposite poles pulled by shortening of spindle fiber. A furrow starts in the cell membrane at the middle in animal cell.

• Telophase: Two sets of daughter chromosomes

reach opposite poles. Spindle fibres disappear chromatids thik out in the form of chromatids fibres. Nuclear membrane is formed.

Cytokinesis:

Cleavage furrow deepens totally in animal cell and seperate the two daughter cells.

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‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ More Information

Significations of Mitosis:

• Growth in the body size fir to formation of new cells
• Repair of damaged cells
• Replacements of old cells with the new cells
• Asexual reproductions in which the unicellular organisms
• Maintains same number of chromosomes in the daughter cells