Abstract
A case of sterility in Drosophila melanogaster is due to the interaction between a second chromosome recessive conditional gene, str(2)350, recovered from a natural population and the cytoplasm. The gene is located between Sp(22.0) and B1(54.8) about one-eighth the distance from B1. The final effect of this interacting system is the suppression of gonad development in both sexes.
