Fission ( biology ) - wikipedia Fission ( biology ) Fission, in biology, is the division of a single entity into two or more parts and the regeneration of those parts into separate entities resembling the original. The object experiencing fission is usually a cell, but the term may also refer to how organisms, bodies, populations, or species split into discrete parts. The fission may be binary fission, in which a single entity produces two parts, or multiple fission, in which a single entity produces multiple parts. Contents 1 Binary fission 1.1 Fission of prokaryotes 1.1. 1 Process of bacterial fission 1.1. 2 Speed of bacterial fission 1.2 Fission of organelles 1.3 Types of Binary Fission 2 Multiple fission 2.1 Fission of protists 2.1. 1 Fission of apicomplexans 2.1. 2 Fission of green algae 2.2 Multiple fission of bacteria 3 Plasmotomy 4 Clonal fragmentation 5 Population fission 6 See also 7 References Binary fission Schematic diagram of cellular growth ( elongation ) and binary fission of bacilli. Blue and red lines indicate old and newly generated bacterial cell wall, respectively. ( 1 ) growth at the centre of the bacterial body. e.g. Bacillus subtilis, E. coli, and others. ( 2 ) apical growth. e.g. Corynebacterium diphtheriae. Organisms in the domains of Archaea and Bacteria reproduce with binary fission. This form of asexual reproduction and cell division is also used by some organelles within eukaryotic organisms ( e.g., mitochondria ). Binary fission results in the reproduction of a living prokaryotic cell ( or organelle ) by dividing the cell into two parts, each with the potential to grow to the size of the original. Fission of prokaryotes The single DNA molecule first replicates, then attaches each copy to a different part of the cell membrane. When the cell begins to pull apart, the replicated and original chromosomes are separated. The consequence of this asexual method of reproduction is that all the cells are genetically identical, meaning that they have the same genetic material ( barring random mutations ). Unlike the process of mitosis used by eukaryotic cells, binary fission takes place without the formation of a spindle apparatus on the cell. In binary fission the parental identity is lost. Process of bacterial fission Binary fission in a prokaryote The process of binary fission in bacteria involves the following steps. First, the cell 's DNA is replicated. The replicated DNA copies then move to opposite poles of the cell in an energy - dependent process. The cell lengthens. Then, the equatorial plane of the cell constricts and separates the plasma membrane such that each new cell has exactly the same genetic material. More specifically, the following steps occur : The bacterium before binary fission is when the DNA is tightly coiled. The DNA of the bacterium has uncoiled and duplicated. The DNA is pulled to the separate poles of the bacterium as it increases the size to prepare for splitting. The growth of a new cell wall begins to separate the bacterium. The new cell wall fully develops, resulting in the complete split of the bacterium. The new daughter cells have tightly coiled DNA rods, ribosomes, and plasmids ; these are now brand new organisms. Speed of bacterial fission Binary fission is generally rapid though its speed varies between species. For E. coli, cells typically divide about every 20 minutes at 37 ° C. Because the new cells will, in turn, undergo binary fission on their own, the time binary fission requires is also the time the bacterial culture requires to double in the number of cells it contains. This time period can, therefore, be referred to as the doubling time. Some species other than E. coli may have faster or slower doubling times : some strains of Mycobacterium tuberculosis may have doubling times of nearly 100 hours. Bacterial growth is limited by factors including nutrient availability and available space, so binary fission occurs at much lower rates in bacterial cultures once they enter the stationary phase of growth. Fission of organelles Some organelles in eukaryotic cells reproduce using binary fission. Mitochondrial fission occurs frequently within the cell, even when the cell is not actively undergoing mitosis, and is necessary to regulate the cell 's metabolism. Types of binary fission Binary fission in organisms can occur in four ways, irregular, longitudinal, transverse, oblique. Irregular : In this fission, cytokinesis may take place along any plane but it is always perpendicular to the plane of karyokinesis. e.g. amoeba Longitudinal : Here cytokinesis takes place along the longitudinal axis. e.g. in flagellates like Euglena. Transverse : Here cytokinesis takes place along the transverse axis. e.g. in ciliate protzoans like paramecium. Oblique : In this type of binary fission cytokinesis occurs obliquely. e.g. ceratium Multiple fission Fission of protists Multiple fission at the cellular level occurs in many protists, e.g. sporozoans and algae. The nucleus of the parent cell divides several times by amitosis, producing several nuclei. The cytoplasm then separates, creating multiple daughter cells. Some parasitic, single - celled organisms undergo a multiple fission - like process to produce numerous daughter cells from a single parent cell. Isolates of the human parasite Blastocystis hominis were observed to begin such a process within 4 to 6 days. Cells of the fish parasite Trypanoplasma borreli have also been observed participating in both binary and multiple fission. Fission of apicomplexans In the apicomplexans, a phylum of parasitic protists, multiple fission, or schizogony, is manifested either as merogony, sporogony or gametogony. Merogony results in merozoites, which are multiple daughter cells, that originate within the same cell membrane, sporogony results in sporozoites, and gametogony results in micro gametes. Fission of green algae Green algae can divide into more than two daughter cells. The exact number of daughter cells depends on the species of algae and is an effect of temperature and light. Multiple fission of bacteria Most species of bacteria primarily undergo binary reproduction. Some species and groups of bacteria may undergo multiple fission as well, sometimes beginning or ending with the production of spores. The species Metabacterium polyspora, a symbiont of guinea pigs, has been found to produce multiple endospores in each division. Some species of cyanobacteria have also been found to reproduce through multiple fission. Plasmotomy Some protozoans reproduce by yet another mechanism of fission called as plasmotomy. In this type of fission, a multinucleate adult parent undergoes cytokinesis to form two multinucleate ( or coenocytic ) daughter cells. The daughter cells so produced undergo karyokinesis, further. Such a type of reproduction is shown by opalina and pelomyxa. Clonal fragmentation Main article : Fragmentation ( reproduction ) Fragmentation in multicellular or colonial organisms is a form of asexual reproduction or cloning where an organism is split into fragments. Each of these fragments develop into mature, fully grown individuals that are clones of the original organism. In echinoderms, this method of reproduction is usually known as fissiparity. Population fission Any splitting of a single population of individuals into discrete parts may be considered fission. A population may undergo fission for a variety of reasons, including migration or geographic isolation. Because the fission leads to genetic variance in the newly isolated, smaller populations, population fission is a precursor to speciation. See also Cytokinesis, cell division in eukaryotes Divisome ( protein complex that initiates cell division in bacteria ) Fission - fusion society, a type of social organization that is notable among primates Paratomy Speciation References Jump up ^ Carlson, B.M. ( 2007 ). Principals of regenerative biology. Elsevier Academic Press. p. 379. ISBN 0 - 12 - 369439 - 6. Jump up ^ Boulay, R.L. ; Galarza, J.A. ; Che, B. ; Hefetz, A. ; Lenoir, A. ; van Oudenhove, L. ; Cerda, X. ( 2010 ). `` Intrafotmobcompetition affects population size and resource allocation in an ant dispersing by colony fission ''. Ecology. 91 ( 11 ) : 3312 -- 3321. doi : 10.1890 / 09 - 1520.1. Jump up ^ Hubbell, S. ( 2003 ). `` Modes of speciation and the lifespans of species under neutrality : a response to the comment of Robert E. Ricklefs ''. Oikos. 100 ( 1 ) : 193 -- 199. doi : 10.1034 / j. 1600 - 0706.2003. 12450. x. 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ISBN 978 - 90 - 481 - 2766 - 5. Retrieved 2016 - 12 - 21. Jump up ^ Whitlock, Michael C. ( May 1994 ). `` Fission and the Genetic Variance Among Populations : The Changing Demorgraphy of Forked Fungus Beetle Populations ''. The American Naturalist. 143 ( 5 ) : 820 -- 829. doi : 10.1086 / 285634. JSTOR 2462878. Jump up ^ Thompson, EA ( October 1979 ). `` Fission models of population variability ''. Genetics. 93 ( 2 ) : 479 -- 95. PMC 1214094. PMID 535728. Retrieved from `` https://en.wikipedia.org/w/index.php?title=Fission_(biology)&oldid=836653151 '' Categories : Cell cycle Asexual reproduction Talk Contents About Wikipedia বাংলা Català Čeština Deutsch Ελληνικά Español Euskara فارسی Français Gaeilge Galego 한국어 हिन्दी Hrvatski Bahasa Indonesia Italiano עברית Kreyòl ayisyen Kurdî Македонски Nederlands 日本 語 ਪੰਜਾਬੀ Polski Português Русский Simple English Türkçe 中文 21 more Edit links This page was last edited on 16 April 2018, at 01 : 42. 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Question: what types of cells go through binary fission
Answer: domains of Archaea and Bacteria; prokaryotic; prokaryotic; Organisms in the domains of Archaea and Bacteria