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Topic: Mitosis

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In the News (Thu 25 Apr 19)

Mitosis is a special kind of cell division used by eukaryote cells.
Mitosis is really a division of the nucleus into two identical nuclei.
Before mitosis starts you cannot see any chromosomes in the nucleus, however, all the DNA in the nucleus is replicated exactly.
www.purchon.com /biology/mitosis.htm   (418 words)

  Mitosis - MSN Encarta
Mitosis results in two cells that are genetically identical, a necessary condition for the normal functioning of virtually all cells.
Mitosis is vital for growth; for repair and replacement of damaged or worn out cells; and for asexual reproduction, or reproduction without eggs and sperm.
Mitosis continues in full-grown organisms as a means of maintaining the organism—replacing dying skin cells, for example, or repairing damaged muscle cells.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761553491   (823 words)

  Mitosis - Wikipedia, the free encyclopedia
Mitosis is the process by which a cell separates its duplicated genome into two identical halves.
Mitosis and cytokinesis together is defined as the mitotic (M) phase of the cell cycle, the division of the mother cell into two daughter cells, each the genetic equivalent of the parent cell.
Although errors in mitosis are rare, the process may go wrong, especially during early cellular divisions in the zygote.
en.wikipedia.org /wiki/Mitosis   (2124 words)

 mitosis. The Columbia Encyclopedia, Sixth Edition. 2001-05
Mitosis is almost always accompanied by cell division (cytokinesis), and the latter is sometimes considered a part of the mitotic process.
The importance of mitosis is the maintenance of the chromosomal set; each cell formed receives chromosomes that are alike in composition and equal in number to the chromosomes of the parent cell.
Despite the relative ease of observation of the physical stages of mitosis under the microscope (primarily because the chromosomes stain readily when in their coiled state), the exact chemical and kinetic nature of mitosis is not yet fully understood.
www.bartleby.com /65/mi/mitosis.html   (703 words)

 [No title]   (Site not responding. Last check: )
MITOSIS By: icemanbm260 Mitosis is the process of nuclear division in a living cell by which the chromosomes are exactly replicated, the two parts being separated are given to the daughter nuclei.
Mitosis in cancerous cells Mitosis, the process in which a cell undergoes nuclear division, is one of the four subdivisions of the cell cycle responsible for cell growth and reproduction.
Among all mitotic phases, metaphase appears to represent the pinnacle of the mitotic state, with the spindle and the condensed chromosomes poised to segregate daughter genomes to the opposite poles of the cell.
www.lycos.com /info/mitosis.html   (629 words)

Mitosis is the process that facilitates the equal partitioning of replicated chromosomes into two identical groups.
The linkages between kinetochores and microtubules are thought to be central in controlling both the positioning of the replicated chromosome at the central portion of the spindle during the alignment phase, and in moving the daughter chromosomes apart after they split at their centromeres.
The stages of mitosis are highlighted in a single cell, and the time/date generator information on each image provides the viewer with a sense of how long each step actually takes.
www.life.umd.edu /CBMG/faculty/wolniak/wolniakmitosis.html   (1103 words)

 Mitosis - cell division
Mitosis is the mechansim involved in all these processes, it is the type of cell division
Multicellular organisms have a huge variety of different types of cell; humans have around 200 different cell types, all of which are derived from a single fertilised egg cell.
Another type of cell division is meiosis, which results in the formation of 4 new cells which have half the number of chromosomes of the parent cell.
www.microscopy-uk.org.uk /mag/artaug99/mitosis.html   (472 words)

 Home Labs: Mitosis Lab
Mitosis is considered nuclear division, since its main stages deal strictly with the nucleus and its contents (DNA).
Mitosis consists of 4 major stages: Prophase, Metaphase, Anaphase, and Telophase.
Mitosis is part of a larger process called the cell cycle.
www.troy.k12.ny.us /thsbiology/labs_online/home_labs/mitosis_lab_home.html   (354 words)

 [No title]
Mitosis is the process in which a eukaryotic cell's nucleus divides to form two nuclei.
In the proper division phase (M-phase of mitosis) a daughter cell identical to the mother cell is produced.
The envelop around the nucleus disappears at the beginning of mitosis and the -duplicated- genetic material is divided equally over the two daughter nuclei.
www.lycos.com /info/mitosis--cells.html   (513 words)

The vegetative cell cycle in eucaryotes generally follows a trajectory whereby periods of nuclear duplication (mitosis), followed by actual (cytoplasmic) cell division (C phase, a.k.a., cytokinesis), are interspersed with periods during which cells are not dividing (interphase).
G1 phase is followed by a period of DNA synthesis, G2 phase (all three cumulatively referred to as interphase), then mitosis (nuclear duplication including prophase, metaphase, anaphase, and, finally, telophase), and, finally, cytokinesis (actual cytoplasmic division).
Note that the number of pairs of sister chromatids found in a cell at this point is equal to the number of chromosomes (i.e., double helical pairs of DNA molecules) found in the cell prior to S phase.
www.mansfield.ohio-state.edu /~sabedon/biol1110.htm   (1356 words)

 CancerQuest : Cell Division : The Cell Cycle
The part of the cell division cycle that gets the most attention is called the M phase or mitosis.
Mitosis is when a single cell actually divides into two daughter cells.
Mitosis is further broken down into sub-phases based on visible changes within the cells, especially within the nucleus.
www.cancerquest.org /index.cfm?page=59   (285 words)

Mitosis deals only with the segregation of the chromosomes and organelles into daughter cells.
During mitosis replicated chromosomes are positioned near the middle of the cytoplasm and then segregated so that each daughter cell receives a copy of the original DNA (if you start with 46 in the parent cell, you should end up with 46 chromosomes in each daughter cell).
Whereas mitosis is the division of the nucleus, cytokinesis is the splitting of the cytoplasm and allocation of the golgi, plastids and cytoplasm into each new cell.
www.emc.maricopa.edu /faculty/farabee/BIOBK/BioBookmito.html   (1365 words)

 SparkNotes: Mitosis: Introduction to Mitosis
Recall that mitosis occurs in somatic cells as opposed to germ cells, which undergo meiosis.
Mitosis follows G2, and is the time in which cells separate their duplicated contents and divide.
The five steps of mitosis and cytokinesis are often considered to be two distinct sub-phases within the general cell-cycle phase we've been calling mitosis, or M phase.
www.sparknotes.com /biology/cellreproduction/mitosis/summary.html   (339 words)

 Mitosis Page (part 2)
Mitosis is the process whereby one parent cell divides to become two daughter cells, without changing the chromosome number in the process.
Note that the centromeres of each chromosome are aligned at the equator of the cell; the telomeres drift away from the equator.
Mitosis results in exactly identical chromosomes in each daughter cell.
www.dmacc.cc.ia.us /instructors/mitosis.htm   (338 words)

 Mitosis: The Division of Plant & Animal Cells   (Site not responding. Last check: )
All of the living organisms on Earth are made up of one or more cells, which are the simplest units of life capable of independent existence and reproduction.
During mitosis and cytokinesis, each of the two daughter cells will receive an exact copy of the parent cell's chromosomes and roughly half of the cytoplasm.
It is important to know that the parent cell's chromosomes are replicated during the S (synthesis) phase of the cell cycle before mitosis can begin.
www.iknow.net /CDROMs/cell_cdrom/cell3.html   (595 words)

 Category:Mitosis - Wikipedia, the free encyclopedia
Mitosis is the process of chromosome segregation and nuclear division that follows replication of the genetic material in eukaryotic cells.
This process assures that each daughter nucleus receives a complete copy of the organism's genome.
The main article for this category is Mitosis.
en.wikipedia.org /wiki/Category:Mitosis   (85 words)

 [8B] Mitosis
Mitosis is a process of cell division resulting in two genetically equivalent daughter cells.
Searching for the middle ground : mechanisms of chromosome alignment during mitosis - J. Cell Biology, 2002.
Mitosis, microtubules, and the matrix - J. Cell Biol., 2001.
www.web-books.com /MoBio/Free/Ch8B.htm   (237 words)

 The Cell Cycle & Mitosis Tutorial
Mitosis is nuclear division plus cytokinesis, and produces two identical daughter cells during prophase, prometaphase, metaphase, anaphase, and telophase.
Interphase is often included in discussions of mitosis, but interphase is technically not part of mitosis, but rather encompasses stages G1, S, and G2 of the cell cycle.
The cell is engaged in metabolic activity and performing its prepare for mitosis (the next four phases that lead up to and include nuclear division).
www.biology.arizona.edu /cell_bio/tutorials/cell_cycle/cells3.html   (357 words)

When a cell is not engaged in mitosis (which is most of the time), it is said to be in interphase.
The two centrosomes of the cell, each with its pair of centrioles, move to opposite "poles" of the cell.
Mitosis is the process of separating the duplicates of each of the cell's chromosomes.
users.rcn.com /jkimball.ma.ultranet/BiologyPages/M/Mitosis.html   (753 words)

For example, a cell with one set of chromosomes is called haploid, a cell with two sets of chromosomes is diploid, and a cell with four sets of chromosomes (not usually a “normal” condition, but sometimes possible) is tetraploid.
Technically, mitosis is specifically the process of division of the chromosomes, while cytokinesis is officially the process of division of the cytoplasm to form two cells.
In plants, cytokinesis begins with a series of vesicles that form at the equator of the cell, which subsequently join until the cell is divided in two.
biology.clc.uc.edu /courses/bio104/mitosis.htm   (1541 words)

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