Two-color in vivo imaging of photoreceptor apoptosis and development in Drosophila

► A method to directly visualize mutant photoreceptors at a single-cell resolution. ► Live imaging of progressive photoreceptor degeneration in an adult fly. ► fatpk10307, CG9523k11101, l(3)06536j2E5 and l(2)k09828 induce apoptosis of photoreceptor. ► grh is required in R3 for PCP establishment.