Table I.

Quantitation of expression patterns of even-skipped (eve) in blastoderm embryos mutant for knirps and rpd3. eve expression patterns were scored in blastoderm embryos derived from crosses of heterozygous individuals carrying mutations in rpd3 and/or knirps. Heterozygosity at the rpd3 locus for two different alleles had little effect on eve patterning (the mutants were outcrossed to a wild-type strain with yw markers). Heterozygosity at the knirps locus led to 14–21% of blastoderm embryos exhibiting a fused 4/6 or missing stripe 5 phenotype; the frequency of this phenotype increased approximately 1.5 – 2 fold in the rpd3 heterozygous backgrounds. rpd3^def24 is a null allele and rpd3 ⁰⁴⁵⁵⁶ is a P-element insertion that strongly reduces rpd3 expression. Values do not add to 100% in some cases because other, heterogeneous and difficult to classify phenotypes were observed in a small number of embryos.

	wild type eve pattern (%)	fused or missing stripe 5 (%)	n
rpd3 04556 x yw67	94	2.5	231
rpd3 04556 x kni9	64	32	331
rpd3 04556 x kni7G	64	29	316
rpd3def24 x yw67	98.5	0.5	219
rpd3def24 x kni9	72	28	294
rpd3def24 x kni7G	66	33	314
kni9 x yw67	85	14	283
kni7G x yw67	79	21	258