Electron microscopic photomap of divisions 64 through 70 of the salivary gland 3L chromosome in Drosophila melanogaster.
The study is a part of an electron microscopic mapping project on the salivary gland chromosomes of D. melanogaster. Chromosomes were fixed with acetic methanol and, alternatively, with formaldehyde-Ringer solution, squashed and thin sectioned for electron microscopy. The banding pattern was compared with the drawn light microscopic map of Bridges, which shows 209 single and 93 double bands within the divisions 64 through 70. Thirteen Bridges' singlets could not be consistently documented in the electron micrographs. About 50 new, mainly very faint bands were found, most of them following formaldehyde fixation. Again, about 40 bands marked double by Bridges were interpreted to be two separate single bands. This paper completes the electron microscopic mapping of the 3L chromosome.
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D000818:Animals; D002871:Chromosome Banding; D002874:Chromosome Mapping; D002875:Chromosomes / Q000648:ultrastructure*; D004331:Drosophila melanogaster / Q000648:ultrastructure*; D008854:Microscopy, Electron; D012469:Salivary Glands / Q000648:ultrastructure