Dikaryon formation is characteristics of

Step-by-step solution

The formation of secondary mycelium is the feature of Ascomycetes and Basidiomycetes. A secondary mycelium forms upon conjugation of two sexually compatible hyphae. The secondary mycelium is dikaryotic, in that it has two haploid nuclei, one from each parent. As the dikaryotic mycelium grows, the cells divide and more septa are formed between the new cells.