lethal - all die before end of larval stage | recessive
melanotic mass phenotype
some die during larval stage | recessive
embryonic/larval lymph gland
larval brain
melanotic mass
Melanotic tumour formation and lethality are due to the same mutation. Mutations exhibit incomplete penetrance and expressivity of the melanotic tumour phenotype. Small and/or abnormally shaped brain. Lymph glands had an increased number of lobes.