ABSTRACT
Sexual reproduction involves union of two compatible nuclei or sex cells or sex organs or somatic cells or somatic hyphae for the formation of new individuals. Sexual stage is perfect stage and technically called as teleomorphic stage. Sexual cycle normally occurs once in the life span of the fungus. The parasexual cycle parallels events in the sexual cycle, resulting in genetically unique haploid offspring but without a meiotic reduction. Hyphae of genetically unique homokaryotic parents grow towards each other by chemotaxis and fuse. The parasexual cycle parallels events in the sexual cycle, resulting in genetically unique haploid offspring but without a meiotic reduction. The diploid nucleus undergoes mitotic recombination to produce a recombined genotype. In the growing hyphae, gradual loss of chromosomes due to repeated rounds of mitotic nondisjunction results in haploidization and unique genotypes in various sectors of mycelium.
