<p>Genotypes are as follows: A. and D. <i>iab-6<sup>4</sup></i>. B. and E. wild type. C. and F. <i>Fab-6<sup>IAB5</sup></i>. A.–C. Show the ventral sternite cuticles made from adult males, homozygous for the genotype indicated above. Notice that A5 differs from A6 based on the sternite shape and the bristles present on the A5 sternite. The opposite homeotic transformations are highlighted by the direction of the arrows on the left and the right of the cuticles. D.–F. Show ventral nerve chords made from homozygous embryos of the genotypes indicated above. Parasegment borders are marked to the left.</p
