amorphic allele - genetic evidence
loss of function allele
lethal - all die before end of embryonic stage | recessive
some die during embryonic stage | recessive
Widespread deletions of pattern elements beyond that simply predicted by epidermal phenotype, and incomplete myoblast fusion.
run22, scsisB-1 has lethal | dominant | heat sensitive phenotype
Females transheterozygous for Df(1)sc19, Df(1)sc10-1 and scsisB-1 show a great reduction in viability and no reduction with Df(1)ase-1.