Meiosis II Separete Sister Chromatids
Rabu, 20 November 2013
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Meiosis II
Prophase II
In prophase II,
there is no chromosome duplication (chromosome replication), like what happens in meiosis I. In this phase, there
occurs duplication in centrioles which
produces daughter centrioles with perpendicular position of the parent
centrioles are then separated into two centrosomes . Nucleus membrane disappears, and spindle is formed.
+containing+single+chromosome.JPG) |
Meiosis II and its stages. At the
end sister chromatid separate and produce
4 daughter
cell (haploid) containing single chromosome.
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Metaphase II
In this phase,
each daughter cell has finished
forming spindle. Each Chromosomes arranges themselves
by lining up in metaphase plate, just Like what happens in mitosis. Each chromatid kinetochore points to Opposite pole, and spindle that comes
from each pole attaches to each
Kinetochore.
Anaphase II
In this phase, centromere
in each chromosome is separated
and two Chromatids from each
chromosome move to opposite pole. The separated Chromatid now
functions as chromosome for each daughter cell.
Telophase II
In this phase, nucleus membrane is formed and surrounds each set of
Chromosomes followed by cytokinesis.
This process produces 4 daughter cells
each of which contains one set of
haploid chromosomes (z).
Meiosis occurs in reproduction organ by producing haploid
(n) sex cells. Meiosis that produces
sex cells (gamete) is called gametogenesis.
source: biology of life
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