3Lt - 72D11 | 89E2 - 87B4 | 61A2 - 3Rt
Heterozygotes are lethal.
In(3LR)bxd106LHR33R is not strictly known to be the precursor to Dp(3;3)S2. Dp(3;3)S2 is stated to have been "synthesized via a sequence of selected single exchanges", starting from In(3LR)HR33 and In(3LR)bxd106, but the intermediates were not specified. To generate this chromosome from In(3LR)bxd106LHR33R, a crossover must have occurred between the two copies of 87B4--89E2, inverting the region 88ish - 61A | 87B - 88ish. Alternatively the crossover in that region could have occurred between the original inversions In(3LR)HR33 and In(3LR)bxd106, with the reciprocal recombinants then undergoing a second crossover event. However, In(3LR)bxd106LHR33R and Dp(3;3)S2 are interconvertable by meiotic recombination --at least on paper -- hencenthe listing of both arrangements in the same entry.