axon & photoreceptor cell R7 | somatic clone
Approximately 20% of mutant photoreceptor R7 axons terminate in the M3 layer of the medulla (this is the layer in which wild-type R8 cell axons terminate) in animals containing mutant clones in the eye.
pros17.17 has axon & photoreceptor cell R7 | somatic clone phenotype, enhanceable | somatic clone by Nf-YC40