The result of forming a heterokaryon of a fungus; the condition of a hypha or cell having two or more genetically distinct haploid nuclei. 
the condition of being a heterokaryon Gr. heteros=different from, karyon=nucleus, -- a cell that contains genetically different nuclei or a thallus made up of such cell. Cf. dikaryon, homokaryon
The condition in which a mycelium contains two genetically different nuclei per cell.
heterokaryon, heterokaryosis In mycology, a fungal cell containing two or more nuclei that are genetically different from each other.