Read the following statements regarding the sexual cycle in fungi: A. In Ascomycetes, karyogamy and meiosis take place in the ascus. B. In Basidiomycetes, plasmogamy occurs by the fusion of two vegetative or somatic cells. C. In Phycomycetes, a distinct dikaryophase occurs before zygospore formation. D. Fungi form fruiting bodies in which reduction division occurs. How many of the above statements are correct?

Step-by-step solution

Statement A is correct: In Ascomycetes, the fusion of nuclei (karyogamy) and subsequent reduction division (meiosis) occur within sac-like structures called asci. Statement B is correct: Basidiomycetes lack distinct sex organs, and plasmogamy is achieved through the fusion of two vegetative or somatic cells of different strains or genotypes. Statement C is incorrect: In Phycomycetes, the fusion of two gametes (plasmogamy) is immediately followed by karyogamy, resulting in a diploid zygote or zygospore. They do not