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Cell division Meiosis
Meiosis is cell division by reduction, it occurs in the division
of the gametes (Oogonium in females and Spermatogonium in the male),
thus producing a half set of chromosomes, which is compound afterwards
to a full set.
Meiosis is performed in two phases:
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Xm1 |
Xm2 |
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Xp
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Xp Xm1 |
Xp Xm2 |
Y
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Y Xm1 |
Y Xm2 |
Some terms
| Term |
Meaning |
| Meiosis |
reduction division of
gametes |
| Mitosis |
Two identical daughter
cells are produced from one parent cell. |
| diploid |
normal body cell with
the double set of chromosomes |
| haploid |
cell with a single set
of chromosomes (for example: a mature oogonium) |
| Gamete |
noun to indicate either
the oogonium or the spermatogonium |
| Oogonium |
gamete of the female |
| Spermatogonium |
Spermium, gamete of the
male |
| homologous |
to correspond to each
other |
| Replication |
Auto-duplication
(new synthesis) |
© katzenzeitung 2/2007 |
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