... 6 2012 © 2012. ¶ Author for correspondence ( uschmid@uchicago.edu ) * Present address: McGill University, Department of Biology, 1205 Dr Penfield Avenue, Montréal, Québec, H3A 1B1, Canada Evolutionary development Bone morphogenetic protein Diptera Bone...

... and by injection into Drosophila embryos. We find that although localisation of wingless transcripts is conserved in Diptera, localisation of even-skipped and hairy pair-rule transcripts is evolutionarily labile and correlates with taxon-specific changes in positioning of nuclei. We show in Drosophila...

... future bristle. This spatial resolution is achieved through modulation of Pnr activity by specific co-factors and by a number of discrete cis -regulatory enhancers in the ac-sc gene complex. We have isolated homologues of pnr and ac-sc in Anopheles gambiae , a basal species of Diptera that diverged from...

... of the individual. Fig. 6. A model for the evolution of proneural gene expression and bristle patterns within the higher Diptera. Representations of proneural gene expression in late larval/early pupal wing imaginal discs of different species are depicted on the right. The corresponding bristle pattern...

... activators such as Pannier. Other species of derived schizophoran Diptera have equally stereotyped, but different, bristle patterns. Divergence of bristle patterns could arise from changes in the expression pattern of proneural genes, resulting from evolution of the cis -regulatory sequences and/or altered...

... that sex-determining cascades, in comparison to other regulatory pathways, evolve much more rapidly. * Author for correspondence (e-mail: rolnot@zool.unizh.ch ) © 2000 by Company of Biologists 2000 (3) What is the function of Sxl in Musca and other Diptera? How was this gene recruited...

...Pat Simpson; Roxane Woehl; Kazuya Usui The spatial distribution of sensory bristles on the notum of different species of Diptera is compared. Species displaying ancestral features have a simple organization of randomly distributed, but uniformly spaced, bristles, whereas species thought to be more...

... have joined the discourse extrapolating from what they have learned about Drosophila to insects in general. Here we present the results of an investigation into the structure of the insect head as revealed by the distribution of engrailed related protein (Engrailed) in the insect orders Diptera...

... determinants bioassay Diptera double abdomen embryo heterospecific transplantation localization microinjection rescue RNA u.v. irradiation The use of bioassays based on either ‘rescue’ or heterotopic transplantation has been instrumental in the analysis of localized cytoplasmic determinants...

... cell differentiation, follicle cell polyploidy and the extracellular current pattern around follicles are discussed. 29 04 1987 © 1987 by Company of Biologists 1987 differentiation immunocytochemistry yolk polypeptides Sarcophaga bullata Diptera ovary follicle cells...