Intracistronic Mapping of Electrophoretic Sites in DROSOPHILA MELANOGASTER: Fidelity of Information Transfer by Gene Conversion

AUTOR(ES)

McCarron, Margaret

RESUMO

A convenient method is described for the intracistronic mapping of genetic sites responsible for electrophoretic variation of a specific protein in Drosophila melanogaster. A number of wild-type isoalleles of the rosy locus have been isolated which are associated with the production of electrophoretically distinguishable xanthine dehydrogenases. Large-scale recombination experiments were carried out involving null enzyme mutants induced on electrophoretically distinct wild-type isoalleles, the genetic basis for which is followed as a nonselective marker in the cross. Additionally, a large-scale recombination experiment was carried out involving null enzyme rosy mutants induced on the same wild-type isoallele. Examination of the electrophoretic character of crossover and convertant products recovered from the latter experiment revealed that all exhibited the same parental electrophoretic character. In addition to documenting the stability of the xanthine dehydrogenase electrophoretic character, this observation argues against a special mutagenesis hypothesis to explain conversions resulting from allele recombination studies.

Documentos Relacionados

• Genetic instability in Drosophila melanogaster: P-element mutagenesis by gene conversion.
• Gene conversion is involved in the transfer of genetic information between naturally occurring inversions of Drosophila.
• tRNA(Tyr) genes of Drosophila melanogaster: expression of single-copy genes studied by S1 mapping.
• The Meiotic Effects of a Deficiency in DROSOPHILA MELANOGASTER: Identification of Two Dosage-Sensitive Sites
• Molecular Analysis of an Unstable P Element Insertion at the Singed Locus of Drosophila Melanogaster: Evidence for Intracistronic Transposition of a P Element