We combine Gal4/UAS, FLP/FRT and fluorescent reporters to generate cell clones that provide spatial, temporal, and genetic information about the origins of individual cells in Drosophila. We name this combination the Gal4 Technique for Real-time and Clonal Expression (G-TRACE). The approach should allow for screening and the identification of real-time and lineage-traced expression patterns on a genomic scale.
Using a large consortium of undergraduate students in an organized program at the University of California, Los Angeles (UCLA), we have undertaken a functional genomic screen in the Drosophila eye. In addition to the educational value of discovery-based learning, this article presents the first comprehensive genomewide analysis of essential genes involved in eye development. The data reveal the surprising result that the X chromosome has almost twice the frequency of essential genes involved in eye development as that found on the autosomes.
This case report describes the clinical, radiologic, and histopathologic features of the glandular odontogenic cyst (GOC). Although a relatively rare lesion not previously reported in the endodontic literature, the GOC is recommended for inclusion in a differential diagnosis of a dentoalveolar radiolucency. The GOC is a destructive lesion that can be easily misdiagnosed microscopically as a central mucoepidermoid carcinoma.
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