Polytene chromosomes normal.
inscP49 mutant MP2 clones display wild-type morphology and development.
In mutant embryos the DA3A muscle is duplicated at the expense of DO5A in most segments.
Approximately 30% of hemisegments produce an extra DA1 muscle in homozygous embryos. There is an approximately 60% reduction in the number of eve-expressing pericardial cells. An additional dorsal oblique muscle is observed in approximately 40-50% of hemisegments, which is likely to be DO1 in many cases. The founder cell of the DA1 muscle (FDA1) and its sibling (FDA1sib) both adopt an FDA1-like identity. The founder cell of the DO1 muscle (FDO1) is duplicated at the expense of its sibling (FDO1sib). numb3 inscP49 embryos have a qualitatively similar phenotype to numb3 embryos, although they exhibit these phenotypes at higher expressivity.
Muscle and pericardial cell defects.
Phenotypically similar to Df(2R)P72.
Defective in orientation of the mitotic spindle.
insc[+]/inscP49, wtsx1 has abnormal neuroanatomy | embryonic stage phenotype
insc[+]/inscP49, wtsx1 has larval RP2 motor neuron | embryonic stage phenotype