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Fig. 1 | Fungal Biology and Biotechnology

Fig. 1

From: Two genomes are better than one: history, genetics, and biotechnological applications of fungal heterokaryons

Fig. 1

The parasexual cycle. The parasexual cycle parallels events in the sexual cycle, resulting in genetically unique haploid offspring but without a meiotic reduction. a Hyphae of genetically unique homokaryotic parents grow towards each other by chemotaxis and fuse. b Nuclei from each unique strain migrate within the fused hypha, which is now considered a heterokaryon. c Haploid nuclei in the heterokaryon undergo karyogamy to create a heterozygous diploid nucleus. d The diploid nucleus undergoes mitotic recombination to produce a recombined genotype. e In growing hyphae, gradual loss of chromosomes due to repeated rounds of mitotic non-disjunction results in haploidization and unique genotypes in various sectors of mycelium

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