Editing Cell division (section)

==Variants==
[[File:Kinetochore.jpg|thumb|200px|left|Image of the [[mitotic spindle]] in a human cell showing [[microtubule]]s in green, chromosomes (DNA) in blue, and kinetochores in red. {{citation needed|date=May 2023}}]]
Cells are broadly classified into two main categories: simple non-nucleated [[Prokaryote|prokaryotic]] cells and complex nucleated [[Eukaryote|eukaryotic]] cells. Due to their structural differences, eukaryotic and prokaryotic cells do not divide in the same way. Also, the pattern of cell division that transforms eukaryotic [[stem cell]]s into gametes ([[sperm]] cells in males or [[Ovum|egg]] cells in females), termed meiosis, is different from that of the division of [[Somatic (biology)|somatic]] cells in the body.

[[Image:Time-lapse video of dividing cells.gif|thumb|280px|Cell division over 42. The cells were directly imaged in the cell culture vessel, using non-invasive [[quantitative phase contrast microscopy|quantitative phase contrast time-lapse microscopy]].<ref>{{cite web |url=https://www.phiab.se/applications/cell-division |title = Phase Holographic Imaging of ''Cell Division'' |website=[[Internet archive]] |archive-url=https://web.archive.org/web/20130629210808/https://www.phiab.se/applications/cell-division |archive-date=29 June 2013 |url-status=dead}}</ref>]]

In 2022, scientists discovered a new type of cell division called asynthetic fission found in the squamous epithelial cells in the epidermis of juvenile zebrafish. When juvenile zebrafish are growing, skin cells must quickly cover the rapidly increasing surface area of the zebrafish. These skin cells divide without duplicating their DNA (the S phase of mitosis) causing up to 50% of the cells to have a reduced genome size. These cells are later replaced by cells with a standard amount of DNA. Scientists expect to find this type of division in other vertebrates.<ref>{{cite journal | vauthors = Chan KY, Yan CC, Roan HY, Hsu SC, Tseng TL, Hsiao CD, Hsu CP, Chen CH | display-authors = 6 | title = Skin cells undergo asynthetic fission to expand body surfaces in zebrafish| journal = Nature | volume = 605 | date = April 2022 | issue = 7908 | pages = 119–125 | pmid = 35477758 | doi = 10.1038/s41586-022-04641-0| bibcode = 2022Natur.605..119C | s2cid = 248416916 }}</ref>