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Cell Division
There
are two types of cell divisions: mitosis and meiosis. The result of mitosis
is origination of two cells genetically identical with the parent cell.
Meiosis
is a division during which the recombination of genetic materialtakes place
and four haploid daughter cells – gametes appear.
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mitosis
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In the human body spermatozoons
and eggs are the result of meiosis which takes place in testicles (men) and
ovaries (women).
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daughter cells are haploid
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Thanks to the reduction of the number of chromosomes after
fertilization the set is not doubled (4n, 8n, 16n…).
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formation
of gametes (meiosis) and fertilization
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In
unicellular organisms mitosis is the means of reproduction.
In multicellular organisms, it is the means of tissue growth and maintenance.
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