Biologia per il liceo/Divisione cellulare: differenze tra le versioni

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Tux3 (discussione | contributi)
Tux3 (discussione | contributi)
Riga 19:
#Si formano nuove membrare nucleari e il citoplasma inizierà a dividersi.
#I cromosomi non sono più visibili e dividendosi il citoplasma, forma le due cellule figlie.
 
[[Image:Major events in mitosis.svg|right|thumb|350px|Mitosis divides genetic information during cell division.]]
 
 
In biology, 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 genetic material. In most eukaryotes, mitosis is accompanied with cell division or cytokinesis, but there are many exceptions, for instance among fungi. There is another process called meiosis, in which the daughter nuclei receive half the chromosomes of the parent, which is involved in gamete formation and other similar processes, which makes the parent cell still active.
 
Mitosis is divided into several stages, with the remainder of the cell's growth cycle considered interphase. Properly speaking, a typical cell cycle involves a series of stages: G1, the first growth phase; S, where the genetic material is duplicated; G2, the second growth phase; and M, where the nucleus divides through mitosis. Mitosis is divided into prophase, prometaphase, metaphase, anaphase and telophase.
 
The whole procedure is very similar among most eukaryotes, with only minor variations. As prokaryotes lack a nucleus and only have a single chromosome with no centromere, they cannot be properly said to undergo mitosis.
 
== Profase ==