Fig. 4

Phenotypic enhancement of recessive L alleles by the absence of PKD. Typical examples of female heads are shown. The upper row represents OreR as control (a) and three homozygous Lobe alleles, L¹ (b), L⁵ (c) and L^G (d). The lower row shows a typical example of a PKD²⁶ homozygous mutant female (a’) in the above genetic background (b’-d’): note enhancement of the L small eye phenotype in the absence of PKD, independent of the L allele. (e) Quantification of eye phenotypes in the given genotype by using the following classification: c0, wild type eyes; c1, one eye is smaller; c2, both eyes are smaller; c3, one eye is smaller and one is of pinhead size or absent; c4 both eyes are of pinhead size or absent. Genotypes are depicted below each column; (+) indicates third chromosome normal for PKD. Crosses were performed at 25 °C. Fractions of phenotypes are depicted; numbers of assessed females are indicated in each column