69% of heterozygous flies show rhythmic locomotor activity, with a period of 24.4 +/- 0.1 hours. 79% of numb³/numb^SW flies show rhythmic locomotor activity, with a period of 24.6 +/- 0.1 hours.

Homozygous embryos lack many of the dorsal and ventral somatic muscles. The expressivity of the phenotype varies for each muscle and not all muscles are affected. Muscle DA1 is almost always absent, while muscle DO1 is lost from more than 50% of hemisegments. The number of eve-expressing pericardial cells is increased compared to wild-type. The founder cell of the DA1 muscle (FDA1) and its sibling (FDA1sib) both adopt an FDA1sib-like identity. The sibling of the founder cell of the DO1 muscle (FDO1sib) is duplicated at the expense of the founder cell of the DO1 muscle (FDO1). numb³ insc^P49 embryos have a qualitatively similar phenotype to numb³ embryos, although they exhibit these phenotypes at higher expressivity.

The RP2sib neuron, vMP2 neuron and U neuron are all duplicated at the expense of their siblings. The number of EL neurons is strongly reduced. pCC/aCC are unaffected. This phenotype is the reciprocal of that shown for spdo, Dl, N and mam embryos.

Clonal analysis revealed an adult mutant macrochaetae phenotype of extra sockets at the expense of hair cells in the notum. Microchaetae in mutant patches show a broader spectrum of transformations, some with a remnant of a hair cell associated with multiple socket-like cells.

apparently null since the neuronal phenotype of homozygotes is indistinguishable from that of hemizygotes.

Df(3R)Exel6157/+, numb³ has cardiogenic mesoderm phenotype

Df(1)CHES-1-like¹/+, numb³ has cardiogenic mesoderm phenotype