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Brain Res. 1990 Dec 3;535(1):147-50.

A deficiency chromosome in Drosophila alters neuritic projections in an identified motoneuron.

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Department of Neuroscience and Cell Biology, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, Piscataway 08854-5635.


The tergotrochanteral muscles (TTM) in the second thoracic segment of the fruitfly, Drosophila melanogaster, power the jump-escape response. The cell bodies of the motoneurons innervating these muscles, located in the thoracico-abdominal ganglion, have prominent posterior and medial neurites. While in wildtype flies of the Canton-S (C-S) and Oregon-R (O-R) strains, the medial neurite of a TTM motoneuron rarely crossed the midline (C-S: 0/17; O-R: 2/8), in heterozygous flies with a deficiency at the base of the X-chromosome, Df(1)16-3-22, the medial neurite frequently crossed the midline (Df(1)16-3-22/C-S: 7/12; Df(1)16-3-22/O-R: 18/22).

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