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Generating cellular heterogeneity is crucial to the development of complex organs. Organ-fate selector genes and signalling pathways generate cellular diversity by subdividing and patterning naïve tissues to assign them regional identities. The Drosophila eye–antennal imaginal disc is a well-characterised system in which to study regional specification; it is first divided into antennal and eye fates...
During neurogenesis, conserved tissue-specific proneural factors establish a cell׳s competence to take on neural fate from within a field of unspecified cells. Proneural genes encode basic helix-loop-helix transcription factors that promote the expression of ‘core’ and subtype-specific target genes. Target genes include both pan-neuronal genes and genes that aid in the process of refinement, known...
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