A set of ~50 targeted deficiencies created by exploiting hybrid element insertion (HEI) and resolution; designed to fill gaps in deletion coverage.
79E5-79F1;80A2-80A3
The distal half of the salivary gland turns but the proximal half does not in embryos homozygous for Df(3L)BSC21 by stage 14.
The Df(3L)BSC21 chromosome does not act as a dominant suppressor of telomeric silencing (assayed using the effect of the chromosome on the eye colour phenotype of flies carrying "P{wvar}KR3-2", a stable "brown-red" variant of the P{3'WP-2,wvar}2Lt insertion).