Recombination in the region between the marker forked and the centromere in inbred Drosophila melanogaster XX and XXY females.
Recombination in the proximal X chromosome interval (forked-centromere) has been studied in hybrids from two inbred lines of Drosophila melanogaster. Attached Ysy+ arms or the proximal region of the Dp (1:1) scV1y+ were used as markers of the centromere. A derived Y chromosome (BsYK) induced a reduction of the recombination frequency in only one of five comparative experiments of XXBsYK and XX females. In two of the tests there was a higher frequency of recombination in the presence of the BsYK. This is not consistent with a competitive preexchange XX and XY association, which according to a generally accepted idea should result in an inevitable decrease in recombination. This is considered as further evidence for non-random Y distribution at regular X disjunction being determined after exchange.
Palmgren
B
B
Department of Genetics, University of Stockholm, Sweden.
D000818:Animals; D002503:Centromere; D003433:Crosses, Genetic; D003434:Crossing Over, Genetic; D004331:Drosophila melanogaster / Q000235:genetics; D005260:Female; D005819:Genetic Markers / Q000235:genetics; D007178:Inbreeding; D008297:Male; D011995:Recombination, Genetic; D014960:X Chromosome; D014998:Y Chromosome
D005819:Genetic Markers