Results 321 to 330 of about 2,712,368 (347)

Karyotypic evolution in patients with myelodysplastic syndromes

Cancer Genetics and Cytogenetics, 1985
Serial cytogenetic studies were performed in 33 patients with myelodysplastic syndrome in order to establish the frequency of karyotypic evolution and to correlate the chromosome and clinical findings during the course of the disease. Fifteen of the 33 patients (45%) showed abnormalities in the first cytogenetic study and this percentage increased to ...
J, Benítez, F, Carbonell, J, Sanchez Fayos, H, Heimpel   +3 more
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Karyotypic evolution in a B-cell lymphoma

Cancer Genetics and Cytogenetics, 1987
A B-cell lymphoma in the lung of a 59-year-old woman showed a near-pentaploid karyotype and chromosomal changes indicating a t(8;14) in cells from a pleural aspirate. Cells from metastases to the skin and a second pleural aspirate were pseudodiploid, but showed separate further complex cytogenetic changes.
P H, Fitzgerald, C M, Morris, I, Rosman, S A, Archer, P E, Hollings   +4 more
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Clonal karyotypic evolution in a pediatric neurofibrosarcoma

Cancer Genetics and Cytogenetics, 1995
A retroperitoneal neurofibrosarcoma infiltrating the spine of a 2-year-old boy was investigated cytogenetically three times over a 5-month period. The first sample, from a diagnostic fine-needle aspiration biopsy, had a supernumerary i(1)(q10) as the sole clonal aberration; two cells showed monosomy 18 in addition to the isochromosome.
F, Mertens, S, Heim, C M, Kullendorff, M, Donnér, I, Hägerstrand, F, Mitelman, N, Mandahl   +6 more
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Karyotype evolution by centromeric fission inZamia (Cycadales)

Plant Systematics and Evolution, 1984
The chromosome numbers of several species ofZamia from Mexico are reported.Z. paucijuga, distributed from central Oaxaca to Nayarit, has been found to have 2n = 23, 25, 26, 27 and 28. 2n = 28 is the highest chromosome number yet found in the cycads. Karyotypes of this species differ principally in the number of telocentric and metacentric chromosomes ...
MORETTI, ALDO, SABATO S.
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Considerations of karyotypic evolution within Vespertilionidae

Experientia, 1977
(Uploaded by Plazi for the Bat Literature Project) The karyotypes of each 2 species of Nyctalus and Murina are examined. It is assumed that the diploid number of vespertilionid ancestor was 44 with a fundamental number of 50 and that the mechanism of karyotypic evolution within subfamily Vespertilioninae is mainly caused by centric fusion. On the other
Andō, K., Tagawa, T., Uchida, T. A.
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The karyotype evolution in chronic granulocytic leukaemia—II. The chromosome and karyotype pattern of advanced evolution

European Journal of Cancer (1965), 1973
Abstract The trends of karyotype evolution were investigated in a material consisting of 3633 karyotyped Ph1-positive metaphases obtained from 48 patients with chronic granulocytic leukaemia. In agreement with observations by others, the majority of the chromosomes gained during progressive evolution were observed to be Ph1, F and, in particular, C ...
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[Karyotype evolution of suborder (Ruminantia)].

Tsitologiia, 2013
Suborder Ruminantia is the largest taxa in order Cetartiodactyla and includes species with great differences in morphology and diploid numbers of chromosomes. To date, the main chromosome changes that formed karyotypes of modern species of this suborder have been described by comparative chromosome painting.
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Ongoing chromosomal instability and karyotype evolution in human colorectal cancer organoids

Nature Genetics, 2019
Ana C. F. Bolhaqueiro, B. Ponsioen, B. Bakker, S. Klaasen, Emre Kucukkose, R. V. van Jaarsveld, J. Vivié, Ingrid Verlaan-Klink, N. Hami, D. Spierings, Nobuo Sasaki, Devanjali Dutta, S. Boj, R. Vries, P. Lansdorp, M. van de Wetering, A. van Oudenaarden, H. Clevers, O. Kranenburg, F. Foijer, H. Snippert, G. Kops   +21 more
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Karyotype and Genome Evolution in Pteridophytes

2012
Although genomics is a field often discussed as a recent development brought upon by the advent of next-generation sequencing technologies, the roots of genomics extend to at least the early twentieth century. Rather than running a gel or assembling sequence reads on a server, early cytologists squashed and stained actively dividing cells and viewed ...
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Karyotypes and Species Evolution and Divergence

1993
In simplistic terms, karyotype may be defined as the morphology of the chromosomes. The karyotype is generally studied at somatic metaphase in root tips (sometimes in shoot tips), pollen mitosis, or at pachytene of meiosis. Chromosome number, total chromosome lengths, arm ratios, secondary constrictions, and satellites constitute important parameters ...
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