Imprecise excision of the P{lArB}argosA254.
Homozygous viable. In the posterior region of the eye the lenses of many ommatidia fuse to build one giant lens. Each ommatidia has an increased number of cone cells, 7-10 compared to 4 in wild type eyes.
aos5/aosA254Δ33 is partially rescued by aosNTD3.sev
aos5/aosA254Δ33 is not rescued by aosCTD6.sev
Weak argos allele.