Insertion of a transposable element.
Mild defects in eye morphology. Defects in the development of the mechanosensory bristles including the macrochaetae, microchaetae and bristles surrounding the eye. Shortened head and scutellum. fw34e/Df(1)KA10 transheterozygotes do not produce any viable adult females, female lethal phase occurs in the pupal stages.
Originally showed eye surface medium folded; bristles much gnarled. Schultz and Curry report that stock in 1940 showed gnarled bristles and eye small but no vertical fold. RK2.
Eye and bristle defects of homozygous adults are rescued by fw+t12.7.
Duncan, 20th May 1934.
Allele is haploinsufficient.