Results 211 to 220 of about 100,877 (263)

Chromosomal duplication in Giardia duodenalis

International Journal for Parasitology, 1993
Strains of Giardia duodenalis from diverse parts of the world have three or four chromosomal bands in the range of 650-800 kb as defined by field inversion gel electrophoresis. The extra chromosome band in this range defined a group of strains which are geographically distinct from other strains missing this band.
J A, Upcroft, A, Healey, P, Upcroft
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DNA duplication and chromosome structure in the Dinoflagellates

Protoplasma, 1981
Members of theDinopbyceae are characterized by having permanently condensed chromosomes throughout the cell cycle. At interphase the chromosomes appear to have bands perpendicular to the long axis of the chromosome with a periodicity of 127 nm. Each band is composed of 2.5 nm fibers and 9.0 nm granules coiled into a helix around a central core of 9.0 ...
D L, Spector, A C, Vasconcelos, R E, Triemer   +2 more
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The Duplication of Chromosomes

Scientific American, 1958
Chromosome duplication first of all requires the replication of the DNA. It is now clear that the replication of most if not all of the chromosomal DNA follows the scheme based on precise base pairing as originally proposed by Watson and Crick [50].
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Choledochal Cyst with 17q12 Chromosomal Duplication

Annals of Human Genetics, 2017
SummaryThe 17q12 chromosomal region carries the HNF1B gene, mutations of which cause various conditions. When searching for HNF1B/17q12 rearrangements among children with biliary atresia and/or choledochal cysts, we identified a male proband carrying a 17q12 duplication spanning 1698 kb that included 24 genes from TBC1D3C to HNF1B.
Radana Kotalova, Petra Dusatkova, Jana Drabova, Lenka Elblova, Tomas Dedic, Ondrej Cinek, Jan Lebl, Stepanka Pruhova   +7 more
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Chromosome Duplication and Pairing

1965
The early cytologists came to the conclusion that in a majority of organisms the leptotene chromosomes were single and that this singleness persisted at least until pachytene. This, in turn, led to the idea that chromosome duplication occurred during pachytene and not, as in mitotic tissues, during interphase.
Bernard John, Kenneth R. Lewis
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Chromosome duplications and deletions and their mechanisms of origin

Cytogenetic and Genome Research, 1999
Duplications and deletions of the same gene loci or chromosome regions are known to produce different clinical manifestations and are significant factors in human morbidity and mortality. Extensive cytogenetic and molecular cytogenetic studies with cosmid and YAC probes in two patients with unique mosaicism for reciprocal duplication-deletion allowed ...
A T, Tharapel, R C, Michaelis, G V, Velagaleti, C H, Laundon, P R, Martens, P D, Buchanan, K E, Teague, S A, Tharapel, R S, Wilroy   +8 more
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A model of chromosome duplication in Escherichia coli

Journal of Theoretical Biology, 1964
Abstract A model of the duplication of a cyclic chromosome in Escherichia coli is presented. Essential feature of the model consists in assuming two forms of DNA polymerase, by whose action polynucleotide is elongated in both directions of the chain with definite polarity, and also assuming an exact matching of the rates at which these enzymes ...
A, Sibatani, S, Hiai
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Duane Syndrome in the Setting of Chromosomal Duplications

American Journal of Ophthalmology, 2010
To describe the clinical findings in 3 patients with Duane syndrome and 3 different chromosomal duplications that may indicate the location of genes involved in the pathogenesis of this ocular motility disorder.Observational case series.setting: Clinical practice.
Sarah B, Smith, Elias I, Traboulsi
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Inverted tandem duplication generates a duplication deficiency of chromosome 8p

Clinical Genetics, 1987
An adult female with severe mental retardation and dysmorphic features is described. A de novo chromosomal aberration involving 8p was found. The karyotype was 46, XX, inv dup (8) (pl2→p23.1). Dosage studies with the DNA probe D8S7, which is located at 8p23→8pter, showed that the patient was monosomic for this marker.
F J, Dill, M, Schertzer, J, Sandercock, B, Tischler, S, Wood   +4 more
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Sorting by Cuts, Joins and Whole Chromosome Duplications

Journal of Computational Biology, 2015
Genome rearrangement problems have been extensively studied due to their importance in biology. Most studied models assumed a single copy per gene. However, in reality, duplicated genes are common, most notably in cancer. In this study, we make a step toward handling duplicated genes by considering a model that allows the atomic operations of cut, join,
Ron Zeira, Ron Shamir
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