History of Mitosis

	Revision 12 . . (edit) December 3, 2001 12:45 am by Sodium
	Revision 11 . . (edit) December 1, 2001 3:01 am by Magnus Manske
	Revision 10 . . (edit) December 1, 2001 2:22 am by Magnus Manske [speling]
	Revision 9 . . (edit) November 29, 2001 7:27 am by (logged).128.164.xxx
	Revision 8 . . (edit) November 29, 2001 7:27 am by (logged).128.164.xxx
	Revision 7 . . (edit) November 20, 2001 2:12 am by Sodium
	Revision 6 . . (edit) October 26, 2001 10:22 pm by Josh Grosse
	Revision 4 . . October 26, 2001 9:34 pm by Taw [s/cell/eucaryotic cell/]

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Difference (from prior major revision) (minor diff, author diff)

Changed: 3c3,4

Mitosis in eukaryotes consists of nuclear division (the division of the cell nucleus) and cytokinesis? (the separation of the two daughter cells), and consists of different phases (Interphase? is technically not a part of mitosis):

Mitosis in eukaryotes consists of nuclear division (the division of the cell nucleus) and cytokinesis? (the separation of the two daughter cells), and consists of different phases. The phase between nuclear divisions, called interphase?, is not technically part of mitosis. In animals, mitosis consists of the following steps:

Changed: 5c6

* During prometaphase?, the [nuclear membrane]? dissolves. Kinetochor?es are build at the centromeres, and microtubuli? are attached, starting to pull the chromosomes into position.

* During prometaphase?, the [nuclear membrane]? dissolves. Kinetochor?es are build at the centromeres, and microtubuli are attached, starting to pull the chromosomes into position.

Changed: 11c12,14

Since prokaryotes do not have a nucleus or a nuclear membrane, and possess only a single chromosome, prokaryotic mitosis is more simple.

The whole procedure is very similar among other eukaryotes, but some minor details vary. For instance, centrioles are not always present, and in many protists (e.g. ciliates) the nuclear membrane does not dissolve. Since prokaryotes do not have a nucleus or a nuclear membrane, and possess only a single chromosome, prokaryotic mitosis is more simple. The genetic material in humans is in the form of 46 chromosones. The chromosones line up in the middle of the cell and are pulled in half by cell fibres. Because the arms of the chromosones are exact copies of each other each new cell still has the same genetic information. The new cells formed with these half-chromosones then develop membranes around the genetic material - becoming nuclei. The DNA then spreads out in each daughter cell into long strings and forms in to double-armed chromosomes.

Changed: 13c16

The genetic material in humans is in the form of 46 chromosones. The chromosones line up in the middle of the cell and are pulled in half by cell fibres. Because the arms of the chromosones are exact copies of each other each new cell still has the same genetic information. The new cells formed with these half-chromosones then develop membranes around the genetic material - becoming nuclei. The DNA then spreads out in each daughter cell into long strings and forms in to double-armed chromosones.

:See also : genetics -- cell biology -- meiosis -- cell cycle

Changed: 15c18

:See also : genetics -- cell biology -- meiosis

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