Gradual degeneration of sex in fungi . Degeneration means the functional or structural simplification of reproduction system and reproduction mechanism. The evolution of sex in fungi is completely different and doesent resemble progressive line of evolution as in the other group of living organisms. In lower groups of fungi, the sexual reproduction takes place through isogamy, anisogamy and oogamy where gametes are developed in gametangia and union of gametes, results in the formation of zygote. But in higher fungi, a progassive simplification of process is observed in different direction. The overall accounts of generation of sex organs are as follows----- (1) Degeneration in sexual gamete: The most primitive type of reproduction in fungi is isogamous, noted in the members of phycomycetes and oogamous type of reproduction is noted in the members of oomycetes like Phytophthora , Pythium ect. Upto this stage, the evolution rum in progressive lime but degeneration starts. (2) Degen...