Expression of CycEΔdom3-1.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4sca-109-68 reduces the number of NB6-4a to NB6-4t transformations compared to wild-type. The number of NB6-4a neuroblasts that lead to more than 2 glia per lineage is also reduced in these mutants.