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Dictionary » C » Cytokinesis

Cytokinesis

Definition

noun

The division of the cytoplasm and the plasma membrane following the division of the nucleus resulting into two cells, each having its own nucleus and cytoplasm surrounded by a plasma membrane.


Supplement

This process begins during the late stage of mitosis (Telophase) and meiosis (Telophase II). In animal cells (and in some plant cells) it is marked by a constriction of the cell membrane called the cleavage furrow. In most plant cells it happens when an expanding cell plate forms across the center of the cytoplasm called the phragmoplast.


Word origin: Greek kyto-, comb. form of kýtos container, receptacle, body + Greek kīnēsis, movement.

Related forms: cytokinetic (adjective).

Compare: karyokinesis.
See also: mitosis.


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Polynculeation

well you may be observing a late telophase, when the nucleus has divided but cytokinesis has not taken place yet. or you may be observing the process of entosis - your cell with two nuclei might actually be a cell inside another cell

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by MrMistery
Fri Jun 12, 2009 7:16 pm
 
Forum: Cell Biology
Topic: Polynculeation
Replies: 1
Views: 118

Re:

... growth factors are present because no factors can induce them to exit from G0. Sure, even if they did enter the cell cycle they couldn't carry out cytokinesis, they are just too specialized for that. Does that clear things up? yep that sums it up:) thank you vmuch!:)

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by amberdagp
Wed Apr 15, 2009 11:22 am
 
Forum: Molecular Biology
Topic: Rare cell division
Replies: 4
Views: 664

Rare cell division

... growth factors are present because no factors can induce them to exit from G0. Sure, even if they did enter the cell cycle they couldn't carry out cytokinesis, they are just too specialized for that. Does that clear things up?

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by MrMistery
Sat Apr 11, 2009 9:34 pm
 
Forum: Molecular Biology
Topic: Rare cell division
Replies: 4
Views: 664

Question about chromosome replication before mitosis

... DO HAVE 92 CHROMOSOMES IN THE CELL. As the nuclear membranes form around the two daughter nucleus, each nucleus has 46 chromosomes within it. As cytokinesis pinches the cell in two, you are left with two cells, each with 46 chromosomes. Thus, you do have 92 chromosomes/cell in anaphase and telophase, ...

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by MrMistery
Sat Mar 07, 2009 5:40 pm
 
Forum: Genetics
Topic: Question about chromosome replication before mitosis
Replies: 1
Views: 771

i need some help.

... with the internet 1.why are spindle fibers important 2.sister chromatids and centromeres make up what 3.what phase follows telophase (i think it's cytokinesis) 4.what effect on the cell would there be if the s phase is not functioning properly 5.compare cytokinesis in an animal cell and a plant ...

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by smilingMeFow
Wed Dec 17, 2008 4:19 am
 
Forum: Cell Biology
Topic: proteins found in the cell membrane.
Replies: 3
Views: 1363
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