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PinkMonkey Online Study Guide-Biology
Mitotic apparatus : It is called achromatic figure and is jointly formed by the centrioles, asters and the spindle body.
Significance of Mitosis
(1) It is an equational division which maintains
equal distribution of the chromosomes after each cell cycle. (2)
The resulting daughter cells inherit identical chromosomal material
(hereditary material) both in quantity (i.e., number) and quality
(i.e., genetic make up or characters). (3) Mitosis maintains a constant
number of chromosomes in all body cells of an organism. (4) It helps
to maintain the equilibrium in the amount of DNA and RNA contents
of a cell, as well as the nuclear and cytoplasmic balance in the
cell. (5) Dead cells are replaced by newly formed cells through
mitosis. It thus helps in the repair of the body. (6) It helps asexual
reproduction, growth and development of organisms.
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SUMMARY - MITOSIS
(1) It can take place in haploid as well as diploid cells. (2) Both the daughter cells formed through mitosis receive similar characters and number of chromosomes as that of the mother cell. (3) The original structure of the chromosomes remains unchanged in both the daughter nuclei. (4) Hence, it is an equational division and the resulting daughter cells are identical qualitatively and quantitatively.
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Table of Contents
6.0 - Introduction
6.1 The Cell Cycle
6.2
Mitosis
6.3 Meiosis
6.4 Comparison between Mitosis & Meiosis
Chapter 7
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