Electron microscope analysis of the E polytene chromosome of Drosophila subobscura: region 70B to 72D.
Revision of the reference map of the polytene chromosomes of Drosophila subobscura was started by means of the electron microscope. We present a map of regions 70B to 72D of the E chromosome obtained from squashed and thin-sectioned salivary glands. It was observed that the total number of bands in divisions 70B to 72D is considerably higher than those depicted in the reference map of Kunze-Mühl and Müller. Functional considerations are made of some regions that show puff structures.
Pérez-Alonso
M
M
Departamento de Genética, Facultad de Ciencias Biológicas, Valencia, Spain.
Cuenca
J B
JB
De Frutos
R
R
D000818:Animals; D002875:Chromosomes / Q000378:metabolism / Q000648:ultrastructure*; D004330:Drosophila / Q000033:anatomy & histology / Q000235:genetics*; D008854:Microscopy, Electron; D014158:Transcription, Genetic