What happens when fungus reproduces ?

 When a fungus reproduces sexually, two haploid

hyphae of compatible mating types come together and

fuse. In some fungi the fusion of two haploid cells

immediately results in diploid cells (2n). However, in other

fungi (ascomycetes and basidiomycetes), an intervening

dikaryotic stage (n + n, i.e., two nuclei per cell) occurs;

such a condition is called a dikaryon and the phase is

called dikaryophase of fungus. Later, the parental nuclei

fuse and the cells become diploid. The fungi form fruiting

bodies in which reduction division occurs, leading to

formation of haploid spores.