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. 1983 May;104(1):63–80. doi: 10.1093/genetics/104.1.63

The Effect of mei-41 on Rdna Redundancy in DROSOPHILA MELANOGASTER

R Scott Hawley 1, Kenneth D Tartof 1
PMCID: PMC1202069  PMID: 6305765

Abstract

The recombination and repair defective mutant, mei-41, exhibits three rather striking effects on the genetic properties and chromosomal stability of rDNA in Drosophila. First, mei-41 inhibits rDNA magnification. However, mei-9, another recombination and repair defective mutation has no similar effect. This indicates that magnification requires some, but not all, of the gene products necessary for meiotic exchange. Second, under magnifying conditions, mei-41 induces interchanges between the X rDNA and either arm of the Ybb- chromosome. These interchanges occur at high frequency and are independent of rDNA orientation. Third, in mei-41 bb+/Ybb+ males, bobbed mutants in the X, but not the Y, also arise at high frequency. Evidence suggests that these events involve the rDNA type I insertion. The recombination and repair defective properties of mei-41 together with our results regarding its unusual and specific effects involving rDNA are explained in a simple model that has general implications for chromosome structure.

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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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