Electron microscopy of surface spread polytene chromosomes of Drosophila and Stylonychia

The ultrastructure of polytene chromosomes of Drosophila and Stylonychia were compared in whole-mount spread preparations. In Drosophila the chromomeres appear as dense, unresolvable structures interconnected by 10-nm interband fibers. In contrast, chromomeres of Stylonychia polytene chromosomes are...

Full description

Saved in:

Bibliographic Details
Published in:	Chromosoma Vol. 89; no. 2; pp. 107 - 110
Main Authors:	Meyer, G.F, Lipps, H.J
Format:	Journal Article
Language:	English
Published:	Berlin Springer 01-01-1984
Subjects:	animal breeding animal genetics Animals arthropods Biological and medical sciences Cytogenetics Drosophila Drosophilidae entomology Fundamental and applied biological sciences. Psychology Genetics of eukaryotes. Biological and molecular evolution Stylonychia Protozoa Stylonychia mytilus Polytene chromosome Insecta Drosophila Chromosome banding Transmission electron microscopy Arthropoda Cytogenetics Ciliata Invertebrata Diptera Comparative study
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The ultrastructure of polytene chromosomes of Drosophila and Stylonychia were compared in whole-mount spread preparations. In Drosophila the chromomeres appear as dense, unresolvable structures interconnected by 10-nm interband fibers. In contrast, chromomeres of Stylonychia polytene chromosomes are formed by aggregates of 30-nm loops laterally attached to 10-nm interband fibers. It is suggested that the polytene chromosomes in these two species are analogous rather than homologous structures.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0009-5915 1432-0886
DOI:	10.1007/BF00292893