title: Improved methods for permanent chromosome preparations: cellophane squashes and citric acid dissociation.
mesh_terms: D000818:Animals; D002476:Cellophane; D002875:Chromosomes; D002951:Citrates; D003584:Cytological Techniques; D004330:Drosophila / Q000648:ultrastructure; D005898:Glass; D010944:Plants / Q000648:ultrastructure; D012469:Salivary Glands / Q000648:ultrastructure; D013194:Staining and Labeling
chemical_list: D002951:Citrates; D002476:Cellophane