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Cell Division
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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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| meiosis, 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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