The chromosomes of twoDrosophilaraces:D. nasuta nasutaandD. nasuta albomicansIII. Localization of nucleolar organizer regions

✍ Scribed by K. Hägele; H. A. Ranganath

• Publisher: Springer Netherlands
• Year: 1983
• Tongue: English
• Weight: 461 KB
• Volume: 60
• Category: Article
• ISSN: 0016-6707
• DOI: 10.1007/bf00127498

✦ Synopsis

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.