Embryonic lethal when heterozygous with the MBT chromosome.
btxP, tld6 has lethal | larval stage phenotype
Df(3R)XTA1, btxP has lethal | embryonic stage phenotype
btxP, neur3 has lethal | pupal stage phenotype
Df(3R)Espl1, btxP has lethal | pupal stage phenotype
btxP, pll2 has lethal | pupal stage phenotype
btxP Df(3R)Espl1 results in anal plate neoplasms.