torpid a new sex-linked paralytic mutation in Drosophila melanogaster.

A new temperature-sensitive paralytic locus on the X chromosome of Drosophila melanogaster called torpid is described. Mosaic analysis shows that the focus of defect in torp lies in the presumptive neural region of the blastoderm. Electrophysiological tests indicate that the excitability of the cervical axons is lowered at elevated temperatures.