Hostname: page-component-745bb68f8f-5r2nc Total loading time: 0 Render date: 2025-01-18T09:13:58.347Z Has data issue: false hasContentIssue false
  • English
  • Français

XV.—“Ectopic” Pairing and the Distribution of Heterochromatin in the X-Chromosome of Salivary Gland Nuclei of Drosophila melanogaster

Published online by Cambridge University Press:  11 June 2012

B. M. Slizynski
B. M. Slizynski
Affiliation:
Department of Biology and Genetics, Polish Medical School, and the Institute of Animal Genetics,University of Edinburgh.
Get access

Extract

The problem to be presented here emerges from the following groups of facts and more or less generally accepted opinions.

As heterochromatin we may define those parts of chromosomes which reach maximum nucleic acid charge in mitosis or meiosis in times other than metaphase. In salivary gland chromosomes (which are more conveniently called polytene chromosomes) of Drosophila melanogaster the proximal heterochromatic parts of all chromosomes come together and form a central undifferentiated mass, the chromocentre. Genetically heterochromatin forms the so-called inert regions of the chromosomes.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 62 , Issue 2 , 1946 , pp. 114 - 119
Copyright
Copyright © Royal Society of Edinburgh 1946

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

References to Literature

Bauer, H., 1935. “Der Aufbau der Chromosomen aus den Speicheldrüsen von Chironomus Thummi Kiefer,” Zeits. Zellforsch. micr. Anat., XXIII, 280–313.CrossRefGoogle Scholar
Bridges, C. B., 1937. “Correspondences between Linkage Maps and Salivary Chromosome Structure as illustrated in the Tip of Chromosome 2R of Drosophila melanogaster,” Cytologia, Fujii Jubilee Volume, pp. 745–755.CrossRefGoogle Scholar
Bridges, C. B., 1938. “Revised Map of the Salivary Gland X-Chromosome of Drosophila melanogaster,” Journ. Hered., XXIX, 11–13.CrossRefGoogle Scholar
Caspersson, T., 1941. “Studien über den Eiweissumsatz der Zelle,” Naturwiss., XXIX, 33–43.CrossRefGoogle Scholar
Dobzhansky, Th., 1944. “Distribution of Heterochromatin in the Chromosomes of Drosophila pallidipennis,” Amer. Nat., LXXVIII, no. 776, 193–213.CrossRefGoogle Scholar
Kaufmann, B. P., 1939. “Distribution of induced Breaks along the X-Chromosome of Drosophila melanogaster,” Proc. Nat. Acad. Sci., XXV, 571–577.CrossRefGoogle Scholar
Mather, K., 1944. “The Genetical Activity of Heterochromatin,” Proc. Roy. Soc., B. [In press.]Google Scholar
Muller, H. J., and Painter, T. S., 1932. “The Differentiation of the Sex Chromosomes of Drosophila into Genetically Active and Inert Regions,” Zeits. induct. Abst. Vererb., LXII, 316–365.Google Scholar
Pontecorvo, G., 1944. “Structure of Heterochromatin,” Nature, CLIII, 365–367.CrossRefGoogle Scholar
Prokofieva-Belgovskaja, A. A., and Khvostova, V. V., 1939. “Distribution of Breaks in the X-Chromosome of Drosophila melanogaster,” C.R. (Dokl.) Acad. Sci. U.R.S.S., XXIII, 270–272.Google Scholar