Expression of Ble1/+ varies, best at 26oC. Excellent expression in homozygote at all temperatures. B1; Ble1/Ble1 results in an extremely narrow eye. If Ble1 represents a transposition of the B locus to chromosome 3, the flanking loci of f+ and os+ have not been transposed. Also against transposition is absence of sexual dimorphism that dosage compensation of B should produce in such a case.
Expression of Ble1/+ varies, best at 26oC. Excellent expression in homozygote at all temperatures. B1; Ble1/Ble1 results in an extremely narrow eye. If Ble1 represents a transposition of the B locus to chromosome 3, the flanking loci of f+ and os+ have not been transposed. Also against transposition is absence of sexual dimorphism that dosage compensation of B should produce in such a case.