X and Y chromosomes
R1 and R2 Retrotransposition and Deletion in the rDNA Loci on the X and Y Chromosomes of Drosophila melanogaster
... and X and Y rDNA loci: The imprecise mechanism of non- Dover 1983; Gillings et ...the X and Y chromosomes, the germ line in which these truncated copies results in the formation of a ...
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COMPOUND CHROMOSOMES INVOLVING THE X AND Y CHROMOSOMES OF DROSOPHILA MELANOGASTER
... Chromosomes are described that have the entire euchromatic portion of the X chromosome, singly inverted, multiply inverted or in normal sequence, essen- tially inserted i[r] ...
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THE GENETICS OF ARTEMIA SALINA. V. CROSSING OVER BETWEEN THE X AND Y CHROMOSOMES
... The position of the alleles at the white locus does not affect recombination; that is, within a stock descended from a single female, X+Y, females do not differ from X,Y+ fe[r] ...
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NEW EVIDENCE FOR THE HOMOLOGY OF THE SHORT EUCHROMATIC ELEMENTS OF THE X AND Y CHROMOSOMES OF DROSOPHILA BUSCKII WITH THE MICROCHROMOSOME OF DROSOPHILA MELANOGASTER
... 1950, 1952). In previous investigations of D. busckii, cytological and genetical evidence was obtained pointing to the homology of the short euchromatic elements of the X and[r] ...
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Evolution of the Ribosomal DNA Spacers of Drosophila melanogaster: Different Patterns of Variation on X and Y Chromosomes
... Ribosomal spacer length variation within lines and geographic regions: T h e NTS length differences within each isofemale line are most pronounced be- tween X- and Y[r] ...
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THE NATURE OF INDUCED EXCHANGES BETWEEN THE ATTACHED-X AND Y CHROMOSOMES IN DROSOPHILA MELANOGASTER FEMALES
... A com- parison of the distribution of breaks along the Y chromosome when it is involved in detachments and when it is involved in true translocations and gross deletions would r[r] ...
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ORGANIZATION AND MAPPING OF A SEQUENCE ON THE DROSOPHILA MELANOGASTER X AND Y CHROMOSOMES THAT IS TRANSCRIBED DURING SPERMATOGENESIS
... T h e remarkable finding is that fragments homologous to the XDm2Ll tandem repeat are present at or near the Stellate control region on the Y chromosome.. Furthe[r] ...
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THE EFFECT OF HETEROZYGOUS AUTOSOMAL INVERSIONS ON INDUCED EXCHANGES BETWEEN THE ATTACHED-X AND Y CHROMOSOMES IN DROSOPHILA MELANOGASTER FEMALES
... The significant increase in induced recombination obtained with heterologous rearrangements, in regions where, for all practical purposes, no spontaneous meiotic crossing ove[r] ...
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ADDITIONAL DATA ON CROSSING OVER BETWEEN X AND Y CHROMOSOMES IN DROSOPHILA MELANOGASTER
... long arm occurs to the left of the normal allele for bobbed, and should manifest non-bobbed if crossing over takes place to the right of bobbed.. Eighteen X’s without[r] ...
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POLYTENIZATION OF THE RIBOSOMAL GENES ON THE X AND Y CHROMOSOMES OF DROSOPHILA MELANOGASTER
... X X / Y polytene tissue, however, showed only the Y chromosome polytene pattern, indicating that genes from only one nucleolus organizer are replicated in cells contain[r] ...
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SPERMATOGONIAL EXCHANGE BETWEEN THE X AND Y CHROMOSOMES OF DROSOPHILA MELANOGASTER
... I t is evident that dyscentric exchange distal to the fertility factors of y9 gives rise to a bridge which, if broken a t the right and to the right of the included [r] ...
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PRODUCTION OF ALTERED Y CHROMOSOMES BEARING SPECIFIC SECTIONS OF THE X CHROMOSOME IN DROSOPHILA
... The triply marked y+Yw+B” has been irradiated, and a large number of fertile singly and doubly marked derivatives have been recovered.. Among these are several y+Yw+ chro[r] ...
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Reciprocal recombination and the evolution of the ribosomal gene family of Drosophila melanogaster.
... T h e role of reciprocal recombination in the coevolution of the ribosomal RNA gene family on the X and Y chromosomes of Drosophila melanogaster was assessed by determi[r] ...
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TRANSLOCATIONS BETWEEN THE X AND THE Y CHROMOSOMES OF DROSOPHILA MELANOGASTER
... males were determined; the salivary chromosome break point in the X and the arm of the Y involved were also determined, and the viability of the various types of aneuploid pr[r] ...
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RADIATION INDUCED X-Y EXCHANGE AND NONDISJUNCTION IN SPERMATOCYTES OF THE IMMATURE TESTIS OF DROSOPHILA
... I n the above cited work of SAVHAGEN and of STRANGIO, carried out on adult males, the in- crease in the rate of nondisjunction of X and Y chromosomes was taken as[r] ...
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The molecular through ecological genetics of abnormal abdomen. IV. Components of genetic variation in a natural population of Drosophila mercatorum.
... Because males always donate their X chromosome to their daughters and their Y chromosome to their sons, the genetic state of the X and Y chromosomes of males from nature c[r] ...
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Variation in the Human Dentition: Some Past Advances and Future Opportunities
... the Y chromosome promotes both dentin and enamel growth, whereas the effect of the X chromosome seems to be limited to enamel (Alvesalo and Tammisalo, 1981; Alvesalo, 1985; Alvesalo et ...the X and ...
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Evidence for Emergence of Sex-Determining Gene(s) in a Centromeric Region in Vasconcellea parviflora
... reaction. Chromosomes were counterstained with 49,6-diamidino-2-phenylindole (DAPI) in VectaShield antifade solution (Vector Laboratories, Burlingame, ...putative Y chromosome and expressed in percentage of ...
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SEQUENCE OF CENTROMERE SEPARATION: ROLE OF CENTROMERIC HETEROCHROMATIN
... Thus, in animal NB-79, 25 cells showed initial or complete separation of X chromosome without Y showing any separation, in contrast to only four Y chromosomes sh[r] ...
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Y chromosomes and Irish phylogeography
... and Y chromosome and mtDNA ...mtDNA, Y chromosomes, human lymphocyte antigen (HLA), beta globin, the zinc finger gene on the X chromosome (ZFX) intron and microsatellites all suggest an ...
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