Break at 21D translocates the 5' portion of the ds gene, including part of the 40kb intron, to the third chromosome, separating the first five cadherin repeats from the remaining 3' portion of ds. Predicted product will be a secreted and truncated protein.
In addition to 100% penetrant defects in leg, wing and thorax, rough patches in the eye appear at low frequency. Anterior crossvein is displaced posteriorly.