The different steps of parasexual reproduction are; (i) Formation of heterokaryotic mycelium (ii) Fusion between two nuclei (Karyogamy) (a) Fusion between like nuclei (b) Fusion between unlike nuclei (iii) Multiplication of diploid nuclei (iv) Occasional Mitotic crossing over. (v) Sorting out of diploid nuclei (v) Occasional haploidisation of diploid nuclei, and (vii) Sorting of new haploid strains.