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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.
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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.

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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

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References

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