A P-element identical to that present in vg21-3 is present.
visible (with Df(2R)vg-B)
wing (with Df(2R)vg-B)
vg21r7/Df(2R)vg-B animals show a bell-shaped phenotype distribution from normal to moderate wing nicking, in which over 90% of the wings have a discernible mutant phenotype.