Exchange between the ribosomal RNA genes ofXandYchromosomes inDrosophila melanogastermales
- 1 August 1981
- journal article
- research article
- Published by Hindawi Limited in Genetics Research
- Vol. 38 (1) , 1-7
- https://doi.org/10.1017/s001667230002036x
Abstract
SUMMARY: The genes coding for the 18s and 28s ribosomal RNA (rRNA) are present on both theXandYchromosomes ofD. melanogasterat a site known as thebobbedlocus. Exchange was observed in males between a normally orientatedXandYchromosome (Dp(1; 1)scv1andBSY y31d) with a frequency of 0·079%. One-quarter (7 in 27) of these exchange products between two + chromosomes which both carried sufficient rRNA genes for abb+phenotype exhibited abbphenotype. Evidence is presented that one-half, and possibly all, of the exchanges involved the repetitivebbgenes. These results together with those reported by Palumbo, Caizzi & Ritossa (1973) imply that the repeatedbbgenes of either (or both) theXorYchromosome are not arranged with uniform polarity and, further, that spermatogonial exchange between theXandYchromosomes may be restricted to thebbloci.This publication has 20 references indexed in Scilit:
- The genetic analysis of D. melanogaster heterochromatinCell, 1980
- Sequence arrangement of the rDNA of Drosophila melanogasterCell, 1977
- The structural organization of ribosomal DNA in drosophila melanogasterCell, 1977
- The timing of the restitution of chromosome breaks induced by X-rays in the mature sperm of Drosophila melanogasterMutation Research - Fundamental and Molecular Mechanisms of Mutagenesis, 1976
- Similarities and differences in the structure of X and Y chromosome rRNA genes of DrosophilaNature, 1976
- On the Cell Stage of X-Y Recombination During rDNA Magnification in DrosophilaCold Spring Harbor Symposia on Quantitative Biology, 1974
- Increasing the Multiplicity of Ribosomal RNA Genes in Drosophila melanogasterScience, 1971
- Partial and total sex-chromosome less induced by X-rays in mature spermatozoa of Drosophila melanogasterMutation Research - Fundamental and Molecular Mechanisms of Mutagenesis, 1970
- MEIOTIC CONJUNCTIVE ELEMENTS NOT INVOLVING CHIASMATAProceedings of the National Academy of Sciences, 1964
- Cytogenetic analysis of major heterochromatic elements (especially Xh and Y) in Drosophila melanogaster, and the theory of “heterochromatin”Chromosoma, 1959