title: Y chromosomal DNA of Drosophila hydei.
abstract: Six recombinant DNA clones are described, which are derived from the Y chromosome of Drosophila hydei. They reveal characteristic features of Y chromosomal DNA sequences. Three of the cloned inserts are Y-specific and are members of the same family of repeated sequences associated with the lampbrush loop-forming fertility gene "nooses" in the short arm of the Y chromosome. The other three cloned sequences are members of three different families of repeated sequences, but display a small amount of homology to one another and to the family of the nooses sequences. These three cloned sequences are found preferentially in the Y chromosome, but also in other chromosomal positions. The Y chromosomal copies are located in the short arm of the Y chromosome. The other copies are found in autosomal kinetochore-associated heterochromatin or, for one of the cloned sequences, in one band of the giant chromosome 4, in addition to the kinetochore heterochromatin.
mesh_terms: D000818:Animals; D001483:Base Sequence; D002874:Chromosome Mapping; D004262:DNA Restriction Enzymes; D004274:DNA, Recombinant / Q000302:isolation & purification*; D003854:Deoxyribonucleotides / Q000032:analysis; D004330:Drosophila; D005260:Female; D008297:Male; D009693:Nucleic Acid Hybridization; D012091:Repetitive Sequences, Nucleic Acid; D012730:Sex Chromosomes / Q000032:analysis*; D014998:Y Chromosome / Q000032:analysis*
chemical_list: D004274:DNA, Recombinant; D003854:Deoxyribonucleotides; D004262:DNA Restriction Enzymes