Possible a point mutation or a deletion of less than 200bp.
Haltere are transformed to wing and are 3-5% of wing size, dorsal tissue of T3 is incompletely transformed to metanotum, hypopleural plates are incompletely transformed to sternopleural plates, 0-3 hypopleural bristles are still present and the anterior third leg displays a weak transformation to anterior second leg, as seen by the bristle pattern.
RK3 Homozygotes are wild type. Heterozygotes with Ubxbxd-100 or Df(3R)P9 exhibit weak bx-like effects.
Lewis.