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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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Re: Chromatin

... During cell division, the centromeres separate into two parts, each travelling with one molecule of DNA into a daughter cell. For a moment, before cytokinesis, the dividing cell contains 92 chromosomes, but when the cell membrane seals up each of the daughter cells is back to 46 chromosomes (the ...

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by jonmoulton
Thu Sep 04, 2014 3:04 pm
 
Forum: Genetics
Topic: Chromatin
Replies: 2
Views: 879

Cell Organelles

... the cytoskelaton disassembles to make the mitotic spindle, the organelles just float around and they can float into the daughter cell right before cytokinesis occurs, but I'm curious to know how the cells make more organelles if they have too few or something. Thanks!

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by RandomStudent
Mon Jan 28, 2013 3:48 am
 
Forum: Cell Biology
Topic: Cell Organelles
Replies: 3
Views: 4988

Free-flowing cells and those that are stuck together?

I've just been thinking about the development of an embryo from the zygote stage. How is it that when cytokinesis takes place, the cells all stick together in a little ball? But then, later in life, some are not bound to others (red blood cells, sperm cells, etc.). How is ...

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by SheffJoe
Tue May 29, 2012 8:04 pm
 
Forum: Cell Biology
Topic: Free-flowing cells and those that are stuck together?
Replies: 2
Views: 2484

Incubation of Soil Fungi

... The cfu and od measurement are not useful for mycelial fungi such as Trichoderma spp. the growth of which takes place by apical extension without cytokinesis (cell division). One or a 1000 distinct fungal cells can give 1 cfu. Similarly serial dilution is invalid procedure to reduce inoculum concentration. ...

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by JorgeLobo
Sat Nov 05, 2011 12:52 am
 
Forum: Microbiology
Topic: Incubation of Soil Fungi
Replies: 4
Views: 3175

Why might mitosis be thought of as cellular immortality?

... might mitosis be thought of as cellular immortality? I don't know if this may help, but I do know that once the sister daughter cells are formed (cytokinesis) they enter interphase and the whole cycle repeats.

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by reyrey389
Thu Nov 03, 2011 6:51 am
 
Forum: Cell Biology
Topic: Why might mitosis be thought of as cellular immortality?
Replies: 1
Views: 1347
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