Fungi reproduce sexually through the formation of specialized spores following the fusion of two compatible nuclei (plasmogamy and karyogamy) and subsequent meiosis. The spores involved in this process are:

• Oospores: Thick-walled sexual spores formed in Oomycetes (water molds) after fertilization.

• Ascospores: Sexual spores produced endogenously within a sac-like structure called an ascus in Ascomycetes.

• Basidiospores: Sexual spores produced exogenously on a club-shaped structure called a basidium in Basidiomycetes.

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