microchaeta & adult thorax
The eyes are small and quite rough, the bristles are stout and sometimes duplicated and there are extra hairs on the thorax. The legs are short and thick and the sex comb in the male is large. The wings are sometimes spread, with thick veins frayed out to deltas at the wing margin, and are of a granular texture. Body colour: quite dark.
Body colour: dark. Veins thickened and broadened into deltas at junction with margin; eyes somewhat small and slightly roughened; in extreme cases, ocelli run together into a crescent that encloses the ocellar bristles; hairs on thorax straggly and more numerous; wings small, dark, and somewhat spread. RK2.
Dl[+]/Delta1, M(3)801 has lethal | dominant | pharate adult stage | heat sensitive phenotype
Delta1, Df(2R)M58F has lethal | dominant phenotype
Delta1, Df(2L)M36F-2 has lethal | dominant phenotype
Delta1 is a suppressor of phenotype of Nunspecified
Delta1, RpL27A1 has tarsal segment phenotype
Dl[+]/Delta1, RpL27A1 has tarsal segment phenotype
Dl[+]/Delta1, RpL27A1 has macrochaeta phenotype
Dl[+]/Delta1, M(3)69E1 has adult abdomen phenotype
Delta1, M(3)69E1 has adult abdomen phenotype
Strongly suppresses the expression of N Abruptex alleles.
Dl1 is viable in double heterozygous combination with M(2)31A1, M(3)99E1 or M(2)p1. Dl1 M(2)24F1 double heterozygotes do not eclose, although many flies form pharate adults. These flies have many abnormalities, including shortening of the legs. The tarsus, which is primarily affected, is sometimes reduced to half the size of the tibia. The femur is bent like a bow. One pair of legs (usually the last pair) may be more affected than the others. The wings are often scalloped and have an extreme Dl mutant phenotype; showing both thickening at the crossveins and deltas at the wing margin. The texture of the wing is very brittle. The eye are very rough or may be reduced in size. The ocelli are sometimes fused or one of them may be missing. The bristles are larger than seen in the M(2)24F1 single heterozygote and are often duplicated. Irregular additional hairs are seen on the thorax, as in Dl1 single heterozygotes. Dl1 M(3)69E1 double heterozygotes do not eclose. In extreme cases the abdomen is incompletely chitinised. Dl1 in double heterozygous combination with either M(2)31A1 or M(2)p1 sometimes produces an ey-like mutant phenotype. The lethality of Dl1 RpS31 heterozygotes is partially suppressed by H1.
Bridges, 30th Nov. 1918.
