Kr2 mutants exhibit a loss of malpighian tubules.
One copy of Kr2 has no effect on hemocyte proliferation in third instar larvae.
Malpighian tubule buds are absent in homozygous embryos, although cells at the hindgut/midgut junction form a slightly distended tube. Midgut constrictions do not form normally.
Presence of Kr2 increases the frequency of abdominal segment 1 transformations due to ftzUal1 and increases the frequency of heat shock phenocopy in wild type embryos.
Nondefective in gonad assembly.
No changes in phenotype of tor13D embryos.
Thoracic and abdominal segments 1 to 5 are missing, abdominal segment 5 is duplicated.
strong allele Segments T1-3 and A1-5 deleted; A6 and sometimes A7 and 8 duplicated with reverse polarity.