Figure 1.—

sax¹ and sax² maternal enhancement of dpp mutant progeny. Females heterozygous for the maternal effect mutations, sax¹ or sax², dominantly interact with dpp^hr alleles. Percentage of survivorship of dpp^hr/+ adults (boxed genotypes) is shown on the y-axis. (A) Females heterozygous for sax¹ or sax², the parental chromosomes (cn bw sp and cn bw) or deficiencies that retain (Df(2R)ST1) or lack (Df(2R)P32, Df(2R)H23) sax function were tested for maternal enhancement of dpp^hr4/+ lethality. The number of progeny examined was ≥577. (B) Survivorship of different dpp^hr alleles when crossed with females heterozygous for a given sax mutation is shown as the percentage of expected dpp^hr heterozygous progeny. The female genotypes are indicated by different bar shading. dpp alleles are listed along the x-axis. The number of progeny examined from each cross was ≥200.