RasGAP1A13D/Gap1[+] is an enhancer of photoreceptor cell R7 | increased number phenotype of alphS-331
RasGAP1A13D/Gap1[+], alphS-331 has wing vein phenotype
Introduction of Gap1A13D/+ into a homozygous alphS-331 background not only increases the number of extra R7 cells, but also induces the formation of additional wing vein material.