Euploid in combination with C(2R)RM-SH3 or C(2R)RM-VK2.
The second chromosome heterochromatin does not appear to influence the random meiotic segregation of compound second autosomes during spermatogenesis. The proximal euchromatin is implicated in male meiotic pairing: male autosomal meiotic pairing sites are specific euchromatic chromosomal regions.
C(2L)RM-SH3 is an isochromosome for 2L free of a duplication for 2R genetic loci.