The chromosomes of two Drosophila races: D. nasuta nasuta and D. nasuta albomicans. III. Localization of nucleolar organizer regions

Hägele, K. ; Ranganath, H. A. (1983) The chromosomes of two Drosophila races: D. nasuta nasuta and D. nasuta albomicans. III. Localization of nucleolar organizer regions Genetica, 60 (2). pp. 123-128. ISSN 0016-6707

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Official URL: http://www.springerlink.com/content/u722033u73n861...

Related URL: http://dx.doi.org/10.1007/BF00127498

Abstract

In the two Drosophila races D. n. nasuta and D. n. albomicans the nucleolar-organizer regions (NORs) have been localized on metaphase chromosomes by a combined acid treatment and silver-staining technique. In both Drosophila races one NOR is present on the heterochromatic Y chromosomes and another on the microchromosomes. Such a NOR distribution has not yet been reported in Drosophila. It is suggested that this distribution has evolved from an original type with NORs on the X and Y chromosomes.

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