Probable cyclin-dependent kinase whose activity is most likely regulated by the cyclin cyl-1/Cylin-L (PubMed:29886128). Important for normal oocyte and sperm development; probably required during multiple stages of gametogenesis (PubMed:29886128). Plays a role in the activation of RAS-ERK signaling in the germ line (PubMed:29886128). Also acts partially redundantly with cdk-11.2 to ensure embryonic viability (PubMed:29886128). ATP + L-seryl-[protein] = ADP + H(+) + O-phospho-L-seryl-[protein] ATP + L-threonyl-[protein] = ADP + H(+) + O-phospho-L-threonyl-[protein] Broadly expressed in somatic and germ line cells (at protein level) (PubMed:29886128). Not expressed in sperm (at protein level) (PubMed:29886128). Ubiquitously expressed during all stages of embryogenesis, but expression is low during the first few cell cycles (at protein level). Viable, but exhibit low fecundity and have a reduced brood size (PubMed:29886128). RNAi-mediated knockdown results in fertile adults that produce viable progeny (PubMed:29886128). RNAi-mediated knockdown in L1 stage cdk-11.2 bs101 mutants results in sterility (PubMed:29886128). RNAi-mediated knockdown in L4 stage cdk-11.2 bs101 mutants results in fertile adults that produce few viable embryos (PubMed:29886128). Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. CDC2/CDKX subfamily.