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Comparative morphology of nucleolar DNA in Drosophila . II. Drosophila fulvimaculoides and drosophila tumiditarsus
Author(s) -
Barr H. J.
Publication year - 1971
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051340207
Subject(s) - polytene chromosome , drosophila (subgenus) , nucleolus , biology , dna , chromosome , nucleolus organizer region , morphology (biology) , genetics , drosophila melanogaster , microbiology and biotechnology , evolutionary biology , gene , cytoplasm
This paper reports the demonstration, using fluorescence microscopy, of nucleolar DNA in two species of Drosophila. In Drosophila fulvimaculoides , the nucleolar DNA presents a variable morphology, suggestive of puffing activity. This material, which sometimes shows a banded structure like that of the polytene chromosomes, is shown not to be coextensive with the Y chromosome. Nucleolar DNA is demonstrated in Drosophila tumiditarsus also, and previous reports of an association of the dot chromosome with the nucleolus in this species are confirmed. The special usefulness of these two species for various sorts of investigation in pointed out.