title: The two-dimensional restriction analysis of Drosophila DNAs: males and females.
abstract: Two-dimensional restriction analysis has been applied to terminally labeled restriction segments from adult male and female flies that were the progeny of ten successive single-pair, brother-sister matings. Many of the 2500-4000 different bands that can be seen on autoradiographs are of widely different density, a fact that suggests the superposition of multiple restriction segments of similar sequence. The number of bands observed is significantly fewer than expected. Nearly all of the bands seen in male-DNA displays appear equivalent to those seen in female-DNA displays, but a few sex differences (male-dense and female-dense bands) can be identified--much fewer than expected. When the HpaII-MspI test was applied to fractionated BamHI fragments, between 900 and 1800 discrete C-C-G-G sites were found to be cleaved in a completely equivalent fashion by each isoschizomer.
mesh_terms: D000818:Animals; D004247:DNA / Q000235:genetics; D004260:DNA Repair; D004262:DNA Restriction Enzymes / Q000378:metabolism; D004331:Drosophila melanogaster / Q000235:genetics*; D004591:Electrophoresis, Polyacrylamide Gel / Q000379:methods; D005260:Female; D008297:Male; D012737:Sex Factors
chemical_list: D004247:DNA; D004262:DNA Restriction Enzymes