Final answer:
Basidiospores are haploid spores produced by Basidium, club-shaped structures found in Basidiomycetes fungi.
Step-by-step explanation:
Basidiospores are haploid spores produced by Basidium, club-shaped structures found in Basidiomycetes fungi. When karyogamy occurs inside the basidia, a diploid cell is formed. This cell then undergoes meiosis to produce four loosely attached haploid cells called basidiospores, which are released and dispersed by the wind. When the basidiospores germinate, they form new haploid hyphae.