Expression of gcm2^Scer\UAS.cCa under the control of Scer\GAL4^lama-A8 results in unhealthy larvae. However, these larvae produce no additional glial cells at the expense of neurons within the lamina at the level of the R-cell projection filed or glial precursor cell areas.

Induction of clones in the eye disc which express gcm2^Scer\UAS.cCa under the control of Scer\GAL4^Act5C.PI leads to disruption of the formation of R-cells in the eye and, thus, with optic lobe development. Although no excess glial cells are seen in the eye, these clones do induce ectopic glial cells within the medulla cortex.