Results 281 to 290 of about 3,010,874 (320)

Non-Sciuromorph Rodent Karyotypes in Evolution

Cytogenetic and Genome Research, 2012
Rodents are, taxonomically, the most species-rich mammalian order. They display a series of special genomic features including the highest karyotypic diversity, frequent occurrence of complex intraspecies chromosome variability, and a variety of unusual chromosomal sex determination mechanisms not encountered in other mammalian taxa.
S A, Romanenko, V, Volobouev
openaire   +2 more sources

Karyotype evolution in chronic myelogenous leukaemia

Irish Journal of Medical Science, 1978
The aetiological, diagnostic and prognostic significance of chromosomal findings in the bone marrow in CML are discussed. A classical case progressing to terminal blast crisis is presented and the associated karyotype evolution is described.
F, Lyons, M M, Power, J G, Masterson, D J, O'Sullivan   +3 more
openaire   +2 more sources

Karyotypic evolution in human malignant melanoma

Cancer Genetics and Cytogenetics, 1986
Chromosome studies were performed on direct preparations, early passage cultures, and cell lines derived from melanocytic lesions of 37 patients. There were six congenital or common acquired nevi, six dysplastic nevi, one early primary melanoma (radial growth phase), three complex melanomas (RGP with foci of vertical growth phase), six advanced primary
G B, Balaban, M, Herlyn, W H, Clark, P C, Nowell   +3 more
openaire   +2 more sources

Evolution of karyotypes in snakes

Chromosoma, 1972
Karyotype analysis and morphometric measurement of the chromosomes of 17 species of snakes have been done. Chromosomes of different species so far worked out in each family have been compared using quantitative methods to derive chromosomal affinities between species of different taxonomic categories.
openaire   +2 more sources

Rates of Karyotype Evolution

Systematic Zoology, 1983
Haiduk and Baker (1982) gave an insightful interpretation of rate variation in karyotype evolution. Their descriptive nomenclature, however, is misleading-"karyotypic megaevolution" (Baker and Bickham, 1980) is an inappropriate term to apply to what Haiduk and Baker recognize as simply an exceedingly rapid rate of karyotype evolution.
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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.
openaire   +2 more sources

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.
openaire   +1 more source