Anisogamy- This is the type of sexual reproduction, in which isogametes (gamete having same shape and size) fuse and form a diploid zygote. e.g., Plasmodium. Schizogamy is an asexual phage in protozoans which is merely a simple multiple fission of shizont. Plasmogamy-Union of Protoplasts of two cells. This process generally takes place before karyogamy. i.e., before nucleus fusion, in a sexual reproduction process. Plasmotomy is a special type of binary fission.