Transciptional regulator which is involved in the sex determination and X chromosome dosage compensation pathways (PubMed:23666922, PubMed:17720939). Directly binds to 5'-ATTGAT-3' sites in the promoter of sex-determining factor xol-1 to negatively regulate its expression and promote hermaphrodite development (PubMed:23666922, PubMed:17720939). Associates with condensed DNA during mitosis (PubMed:17720939). During mitosis, localizes to metaphase and anaphase chromosomes (PubMed:17720939). In the hermaphrodite gonads, localizes to the nucleus from late pachytene to diakinesis (PubMed:17720939). Localizes to condensed diakinetic chromosomes (PubMed:17720939). Expressed in hermaphrodite gonads. Expressed in embryos (PubMed:17720939). First expressed in the 2 cell stage, with expression increasing at the 8-cell stage, but subsequently decreasing by the 150-cell stage and almost abolished by the 200-cell stage (PubMed:17720939). RNAi-mediated knockdown results in viable hermaphrodites as in wild-type. Belongs to the CUT homeobox family.