Heterozygous females display the br wing phenotype at 25oC and a stronger phenotype at 18oC. Heterozygous females exhibit 'rbp' bristle phenotype at 18oC and 25oC. Heterozygotes with br24 at 25oC are viable and display an 'rbp' bristle phenotype, most flies also have abnormal legs, none show the br wing phenotype. At 18oC these heterozygotes are lethal.
Schalet.