The table below shows all attached-X stocks in the BDSC collection. For more information on the specific compound X chromosomes, see An introduction to attached-X chromosomes.

In the following genotypes, "0" is used to indicate the absence of a free Y chromosome. This should be considered our best guess. Several stocks donated with "0" in the genotype have been found to carry a free Y chromosome, so you should test for the absence of a free Y in any attached-X stock you obtain. (The X0 male progeny of X^X/0 females crossed to normal males will be sterile and will have crystalline inclusions in their spermatocytes.) All C(1)DX stocks carry a free Y.