Fungus life cycle.
Asexual reproduction involves germination of haploid spores, which divide by mitosis to produce hyphae.
Sexual reproduction (perfect stage) begins when hyphae of different mating types fuse their cytoplasm in a process called plasmogamy, producing heterokaryotic cells with haploid nuclei.
This is followed by karyogamy, or fusion of nuclei.
The diploid zygote is short-lived and undergoes meiosis, producing haploid spores.
Review and exercise: