نتایج جستجو برای: supernumerary marker chromosomes
تعداد نتایج: 200561 فیلتر نتایج به سال:
Supernumerary mini-chromosomes–a unique type of genomic structural variation–have been implicated in the emergence virulence traits plant pathogenic fungi. However, mechanisms that facilitate and maintenance mini-chromosomes across fungi remain poorly understood. In blast fungus Magnaporthe oryzae (Syn. Pyricularia ), have first described early 1990s but, until very recently, overlooked studies...
48,XXXX and 49,XXXXY chromosome constitutions are rare and while several such polysomies have been described in the past, the parental origin of the supernumerary chromosomes has only been described in a few cases.'2 More recently, difficulties owing to the reduced informativeness of the Xg antigen marker have been overcome by the use of X linked restriction fragment length polymorphisms (RFLPs...
The field of human cytogenetics has been through many different stages of development, each of them improving the characterisation of structurally abnormal and/or supernumerary chromosomes. The era of reliable identification of human chromosomes started with the invention of the banding method by Dr Lore Zech in 1968. The introduction of fluorescence in situ hybridisation (FISH) techniques in h...
The field of human cytogenetics has been through many different stages of development, each of them improving the characterisation of structurally abnormal and/or supernumerary chromosomes. The era of reliable identification of human chromosomes started with the invention of the banding method by Dr Lore Zech in 1968. The introduction of fluorescence in situ hybridisation (FISH) techniques in h...
Low-grade fibromyxoid sarcoma (LGFMS) is a rare, low-grade malignant soft tissue tumor that is often mistaken for either benign or more malignant tumor types. Commonly, this tumor affects young adults and typically arises in the deep proximal extremities or trunk with frequent recurrences and can metastasize to the lungs many years later. Most cases have a recurrent balanced translocation invol...
Among catfish species of the genus Rhamdia reported for the Brazilian territory, R. quelen is the most widespread, being found in nearly all hydrographic basins of Brazil. Nowadays, R. quelen is a synonym for at least 47 other species in this genus, its taxonomic status still being controversial. The available cytogenetic reports show a wide variation in the karyotypic macrostructure, with the ...
Thirty-two patients with fertility problems were identified as carriers of small supernumerary marker chromosomes (sSMC). Molecular cytogenetic techniques were used to characterize their chromosomal origin. Together with the other cases available in the literature 111 sSMC cases have now been detected in connection with fertility problems in otherwise clinically healthy persons and characterize...
An inverted duplication of chromosome 15 (inv dup[15] chromosome) is the most common supernumerary marker chromosome in humans. Inv dup(15) chromosomes are commonly associated with mental retardation, epilepsy, behavioral problems and structural malformations. Though epilepsies associated with inv dup(15) chromosomes are often intractable, there have been very few reports regarding the seizure ...
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