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. 1973 Jun;70(6):1883–1885. doi: 10.1073/pnas.70.6.1883

Relative Orientation with Respect to the Centromere of Ribosomal RNA Genes of the X and Y Chromosomes of Drosophila melanogaster

G Palumbo 1, R Caizzi 1, F Ritossa 1
PMCID: PMC433618  PMID: 4198277

Abstract

We tested for recombination within the DNA that codes for ribosomal RNA (rDNA) on the X and Y chromosomes of Drosophila melanogaster. The criterion was the appearance of intermediate bb alleles on X-Y recombinants from wild bb+ and lethal bb1 loci carried on parental chromosomes. Recombination within the rDNA occurs only when the rDNA of the X chromosome is inverted. We conclude that rDNAs of normal X and Y chromosomes have opposite orientation with respect to the centromere. The implications of this observation are discussed.

Keywords: inversion

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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