Unstable ring-X chromosomes derived from a tandem metacentric compound in Drosophila melanogaster.
D000818:Animals; D002869:Chromosome Aberrations; D003433:Crosses, Genetic; D004330:Drosophila; D005804:Genes, Lethal; D005838:Genotype; D008540:Meiosis; D008938:Mitosis; D012730:Sex Chromosomes