Electron microscopy of surface spread polytene chromosomes of Drosophila and Stylonychia

Chromosoma - Tập 89 - Trang 107-110 - 1984
G. F. Meyer1, H. J. Lipps2
1Max-Planck-Institut für Biologie, Universität Tübingen, Tübingen, Federal Republic of Germany
2Institut für Biologie III, Abt. Zellbiologie, Universität Tübingen, Tübingen, Federal Republic of Germany

Tóm tắt

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.

Tài liệu tham khảo

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