title: Cytogenetics of a univalent chromosome in B s  drosophila melanogaster males.
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D002875:Chromosomes; D003582:Cytogenetics; D004330:Drosophila / Q000166:cytology*; D005854:Germ Cells; D008297:Male; D008540:Meiosis; D008858:Microscopy, Phase-Contrast; D013696:Temperature