Crossing-over between X AND Y chromosomes during ribosomal DNA magnification in Drosophila melanogaster.
In genetic combinations undergoing ribosomal DNA magnification, the frequency of crossing-over between X and Y chromosomes is increased at least 20-fold above that in similar combinations not undergoing magnification. Such recombination occurs at the ribosomal DNA level. The data are consistent with a model where extra copies of ribosomal DNA are formed which, after circularization, are integrated into the chromosome.
D000818:Animals; D003433:Crosses, Genetic; D003434:Crossing Over, Genetic; D004247:DNA / Q000096:biosynthesis*; D004270:DNA, Circular / Q000096:biosynthesis; D004331:Drosophila melanogaster; D005260:Female; D005796:Genes; D005838:Genotype; D008297:Male; D010641:Phenotype; D012335:RNA, Ribosomal; D011995:Recombination, Genetic; D012270:Ribosomes / Q000378:metabolism; D012730:Sex Chromosomes
D004270:DNA, Circular; D012335:RNA, Ribosomal; D004247:DNA