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Based on the compatibility in sexual reproduction the fungal hyphae can be distinguished into two types homothallic and heterothallic. In homothallic forms, fusion occurs between the genetically similar strains or mating types. In such forms, meiosis results in the formation of genetically identical spores. In the heterothallic forms, fusion occurs between the genetically different mating types or strains. The strains are genetically compatible and are designated as + strain and strain. In such forms meiosis results in the formation of both the strains, in equal numbers. Heterothallism is a device to prevent inbreeding and promote out breeding.
Based on the compatibility in sexual reproduction the fungal hyphae can be distinguished into two types homothallic and heterothallic. In homothallic forms, fusion occurs between the genetically similar strains or mating types. In such forms, meiosis results in the formation of genetically identical spores. In the heterothallic forms, fusion occurs between the genetically different mating types or strains. The strains are genetically compatible and are designated as + strain and strain. In such forms meiosis results in the formation of both the strains, in equal numbers. Heterothallism is a device to prevent inbreeding and promote out breeding.