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Parasexuality in fungiIntroductionIn some fungi, true sexual cycle comprising of nuclear fusion and meiosis is absent.These fungi derive the benefits of sexuality through a cycle known as parasexual cycle.Parasexual cycle has been discovered not only in several members of Deutromycetes but alsoin fungi belonging to Ascomycetes and Basidiomycetes.Parasexuality is defined as a cycle in which Plasmogamy, Karyogamy and Meiosis[Haploidization] take place in sequence but not at a specified time or at specified points in thelife cycle of an organism.Generally parasexual cycle occurs in those fungi in which true sexual cycle does not takeplace. Parasexualcycle also known as somatic recombinationThe parasexual cycle involves four main stages:1.Establishment of heterokaryosisHeterokaryosis is the condition of having two genetically different nuclei in a cytoplasm of a fungus.It results from the fusion of the cytoplasm of cells from different strains without the fusion of theirnuclei.

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Term
Winter
Professor
Niall Winters
Tags
DNA, Chromosomal crossover, Parasexual cycle

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