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Clonal segregation and positional information in late ommatidial development in Drosophila

Nature volume 274, pages 584586 (10 August 1978) | Download Citation



CELLULAR DIVERSITY in an organ might arise from differential mitoses within a prefixed, genetically determined cell lineage or through the reading of positional values by equipotent cells in a morphogenetic field1. We have studied this problem in the developing eye imaginal disc of Drosophilia, in particular in the cells giving rise to the eight photoreceptor (R) and the five secondary pigment (SP) cells of the adult ommatidium2,3. These cells lie close together within the ommatidium and are easily distinguishable with morphological criteria. We asked the following question: do R and SP cells have common precursors at the latest developmental stage or do they belong to different cell lineages?

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  1. Institut für Biologie III, Schänzlestr. 1, 78 Freiburg i.Br., FRG

    • , G. JÜRGENS
    •  & A. HOFBAUER


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