Abstract
One of the main questions in developmental biology concerns the origin of cell diversity: how do developing cells differentiate the many types that make up any multicellular organism? This is a difficult problem which has been approached with more or less success in a variety of developmental processes and organisms. A case in point is the development of the neural progenitor cells in the fruitfly Drosophila melanogaster. In insects, the cells of the central nervous system (CNS) and of the sensory organs are generated by the proliferation of special progenitors, the neuroblasts and the sensory organ progenitor cells (SOPs). Whereas the former develop from the neuroectoderm of the embryo, the latter originate within the epidermis during later stages of development. However, both cell types have in common that they arise within groups of equivalent cells called proneural clusters. The cells of these clusters have to decide between taking on a neural fate developing as neuroblasts or as SOPs or taking on an epidermal fate and developing as progenitor cells of the epidermis. Commitment and specification of central and peripheral neural progenitors follow similar principles and obey similar rules. Thanks to the combination of embryological, classical genetic, and molecular approaches, our understanding of how the neural progenitors of Drosophila develop has progressed considerably during the past 20 years.
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Campos-Ortega, J.A. (1999). Early Neurogenesis in Drosophila . In: Russo, V.E.A., Cove, D.J., Edgar, L.G., Jaenisch, R., Salamini, F. (eds) Development. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-59828-9_20
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DOI: https://doi.org/10.1007/978-3-642-59828-9_20
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