Practice question

In typical fungal sexual cycle, plasmogamy brings haploid nuclei of compatible mating types into shared cytoplasm creating heterokaryotic or dikaryotic mycelium after hyphal anastomosis. Immediate next phase without nuclear fusion is proliferation of dikaryotic cells via synchronized division, often aided by clamp connections in basidiomycetes ensuring both nuclei segregate. This dikaryotic stage persists extended, with two nuclei dividing conjugately for long periods. Diploid stage only transient after karyogamy inside zygote, ascus or basidium before meiosis. Thus stage directly following plasmogamy is dikaryotic, not diploid, haploid or meiotic.