Novel phenotype of Arm^AA where the planar organization of denticles is disrupted.

<div><p>A–C, Denticles are colored as follows: those pointing anteriorly are red, posteriorly are green, to the top of the page are blue, and to the bottom of the page are orange.</p> <p>A, Wild-type parasegment showing denticle polarity.</p> <p>Almost no denticles point incorrectly (i.e. those that are colored blue or orange).</p> <p>B, <i>arm^F1A</i> M/Z mutant shows a slight increase in denticles that point incorrectly.</p> <p>C, Approximately half of the denticles in an <i>arm^O43A01</i> (M/Z) mutant expressing Arm^AA point incorrectly (i.e. there is an approximately equal number of denticles in each of the four colors).</p>