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- Parasexual_cycle abstract "The parasexual cycle, a process peculiar to fungi and single-celled organisms, is a nonsexual mechanism of parasexuality for transferring genetic material without meiosis or the development of sexual structures. It was first described by Italian geneticist Guido Pontecorvo in 1956 during studies on Aspergillus nidulans (also called Emericella nidulans when referring to its sexual form, or teleomorph). A parasexual cycle is initiated by the fusion of hyphae (anastomosis) during which nuclei and other cytoplasmic components occupy the same cell (heterokaryosis and plasmogamy). Fusion of the unlike nuclei in the cell of the heterokaryon results in formation of a diploid nucleus (karyogamy), which is believed to be unstable and can produce segregants by recombination involving mitotic crossing-over and haploidization. Mitotic crossing-over can lead to the exchange of genes on chromosomes; while haploidization probably involves mitotic nondisjunctions which randomly reassort the chromosomes and result in the production of aneuploid and haploid cells. Like a sexual cycle, parasexuality gives the species the opportunity to recombine the genome and produce new genotypes in their offspring. Unlike a sexual cycle, the process lacks coordination and is exclusively mitotic.The parasexual cycle resembles sexual reproduction. In both cases, unlike hyphae (or modifications thereof) may fuse (plasmogamy) and their nuclei will occupy the same cell. The unlike nuclei fuse (karyogamy) to form a diploid (zygote) nucleus. In contrast to the sexual cycle, in the parasexual cycle recombination takes place during mitosis followed by haploidization (but without meiosis). The recombined haploid nuclei appear among vegetative cells, which differ genetically from those of the parent mycelium.Both heterokaryosis and the parasexual cycle are very important for those fungi that have no sexual reproduction. Those cycles provide for somatic variation in the vegetative phase of their life cycles. This is also true for fungi where the sexual phase is present, although in this case, additional and significant variation is incorporated through the sexual reproduction.".
- Parasexual_cycle wikiPageID "12794834".
- Parasexual_cycle wikiPageLength "9298".
- Parasexual_cycle wikiPageOutDegree "35".
- Parasexual_cycle wikiPageRevisionID "665744280".
- Parasexual_cycle wikiPageWikiLink Anastomosis.
- Parasexual_cycle wikiPageWikiLink Aneuploidy.
- Parasexual_cycle wikiPageWikiLink Aspergillus_nidulans.
- Parasexual_cycle wikiPageWikiLink Biological_life_cycle.
- Parasexual_cycle wikiPageWikiLink Blue_cheese.
- Parasexual_cycle wikiPageWikiLink Candida_albicans.
- Parasexual_cycle wikiPageWikiLink Category:Cellular_processes.
- Parasexual_cycle wikiPageWikiLink Category:Molecular_genetics.
- Parasexual_cycle wikiPageWikiLink Category:Mycology.
- Parasexual_cycle wikiPageWikiLink Chiasma_(genetics).
- Parasexual_cycle wikiPageWikiLink Chromosomal_crossover.
- Parasexual_cycle wikiPageWikiLink Chromosome.
- Parasexual_cycle wikiPageWikiLink Cladosporium_fulvum.
- Parasexual_cycle wikiPageWikiLink Crossing-over_(genetics).
- Parasexual_cycle wikiPageWikiLink Fungi.
- Parasexual_cycle wikiPageWikiLink Fungus.
- Parasexual_cycle wikiPageWikiLink Fusarium_monoliforme.
- Parasexual_cycle wikiPageWikiLink Genetic_recombination.
- Parasexual_cycle wikiPageWikiLink Genotype.
- Parasexual_cycle wikiPageWikiLink Guido_Pontecorvo.
- Parasexual_cycle wikiPageWikiLink Homologous_chromosome.
- Parasexual_cycle wikiPageWikiLink Horizontal_gene_transfer.
- Parasexual_cycle wikiPageWikiLink Hypha.
- Parasexual_cycle wikiPageWikiLink Karyogamy.
- Parasexual_cycle wikiPageWikiLink Magnaporthe_grisea.
- Parasexual_cycle wikiPageWikiLink Meiosis.
- Parasexual_cycle wikiPageWikiLink Nondisjunction.
- Parasexual_cycle wikiPageWikiLink Passalora_fulva.
- Parasexual_cycle wikiPageWikiLink Penicillium_roqueforti.
- Parasexual_cycle wikiPageWikiLink Plasmogamy.
- Parasexual_cycle wikiPageWikiLink Ploidy.
- Parasexual_cycle wikiPageWikiLink Pseudocercosporella_herpotrichoides.
- Parasexual_cycle wikiPageWikiLink Somatic_(biology).
- Parasexual_cycle wikiPageWikiLink Tapesia_yallundae.
- Parasexual_cycle wikiPageWikiLink Teleomorph.
- Parasexual_cycle wikiPageWikiLink Teleomorph,_anamorph_and_holomorph.
- Parasexual_cycle wikiPageWikiLink Ustilago_scabiosae.
- Parasexual_cycle wikiPageWikiLink Verticillium_albo-atrum.
- Parasexual_cycle wikiPageWikiLink Verticillium_alboatrum.
- Parasexual_cycle wikiPageWikiLink Verticillium_dahliae.
- Parasexual_cycle wikiPageWikiLinkText "Parasexual cycle".
- Parasexual_cycle wikiPageWikiLinkText "parasexual cycle".
- Parasexual_cycle wikiPageWikiLinkText "parasexual".
- Parasexual_cycle colwidth "30".
- Parasexual_cycle hasPhotoCollection Parasexual_cycle.
- Parasexual_cycle wikiPageUsesTemplate Template:Cite_book.
- Parasexual_cycle wikiPageUsesTemplate Template:Reflist.
- Parasexual_cycle subject Category:Cellular_processes.
- Parasexual_cycle subject Category:Molecular_genetics.
- Parasexual_cycle subject Category:Mycology.
- Parasexual_cycle hypernym Mechanism.
- Parasexual_cycle type Organisation.
- Parasexual_cycle type Process.
- Parasexual_cycle comment "The parasexual cycle, a process peculiar to fungi and single-celled organisms, is a nonsexual mechanism of parasexuality for transferring genetic material without meiosis or the development of sexual structures. It was first described by Italian geneticist Guido Pontecorvo in 1956 during studies on Aspergillus nidulans (also called Emericella nidulans when referring to its sexual form, or teleomorph).".
- Parasexual_cycle label "Parasexual cycle".
- Parasexual_cycle sameAs Parasexualität.
- Parasexual_cycle sameAs Ciclo_parasexual.
- Parasexual_cycle sameAs Ciclo_parassexual.
- Parasexual_cycle sameAs m.0dgnrg0.
- Parasexual_cycle sameAs Парасексуальный_процесс.
- Parasexual_cycle sameAs Q1540715.
- Parasexual_cycle sameAs Q1540715.
- Parasexual_cycle wasDerivedFrom Parasexual_cycle?oldid=665744280.
- Parasexual_cycle isPrimaryTopicOf Parasexual_cycle.