Plays a role in metaphase-anaphase transition during meiosis I (PubMed:12498686). Required for embryonic anterior-posterior axis formation (PubMed:11832245). At prometaphase, localizes around condensed chromosomes. At metaphase, localizes along chromosomes, dissociates from the sister chromatid after separation and localizes to the cytoplasm at anaphase and interphase. Expressed in oocytes at the prometaphase and metaphase of meiosis I (at protein level). Expressed in early embryo at the prometaphase and metaphase of mitosis (at protein level). RNAi-mediated knockdown causes embryonic lethality (PubMed:12498686). Embryos are arrested at the metaphase-anaphase transition of meiosis I and lack formation of polar bodies (PubMed:12498686). In addition, causes a loss of asymmetric cell division and par-2 mislocalization in the one-cell embryo followed by an arrest at the one-cell stage (PubMed:11832245). Belongs to the WD repeat CDC20/Fizzy family.