Arrange the following events in the correct chronological sequence during the sexual reproduction of a basidiomycete : A. Karyogamy B. Meiosis in zygote C. Plasmogamy D. Formation of dikaryon (n + n) Choose the correct sequence from the options given below :

Step-by-step solution

The sexual cycle in fungi like basidiomycetes begins with plasmogamy (C), which is the fusion of protoplasms of two compatible haploid hyphae. In basidiomycetes, plasmogamy is not immediately followed by the fusion of nuclei. This delay results in an intervening dikaryotic stage where each cell has two nuclei, known as the formation of a dikaryon (n + n) (D). Later, the two nuclei fuse, an event called karyogamy (A), resulting in a diploid zygote. Finally, the diploid zygote undergoes reduction division, or meiosis