منابع مشابه
Small supernumerary marker chromosomes (sSMC) in humans.
Small supernumerary marker chromosomes (sSMC), defined as additional centric chromosome fragments too small to be identified or characterized unambiguously by banding cytogenetics alone, are present in 0.043% of newborn children. Several attempts have been made to correlate certain sSMC with a specific clinical picture, resulting in the description of several syndromes such as the i(18p)-, der(...
متن کاملSmall Supernumerary Marker Chromosomes in Human Infertility.
Small supernumerary marker chromosomes (sSMC) are structurally abnormal chromosomes that cannot be unambiguously identified by banding cytogenetics. The objective of this study was to provide an overview of sSMC frequency and characterization in a context of infertility and to review the literature describing sSMC in relation with male and female infertility. Therefore, a systematic literature ...
متن کاملEffects of marker chromosomes on relative viability.
Viability relative to Cy/Pm as a standard was studied in Drosophila melanogaster. One experiment, E1, consisted of progeny from eleven distinct 7 x 7 factorial mating designs with reciprocals for second chromosomes extracted from a natural population. The other experiment, E2, consisted of two distinct sets of heterozygotes with reciprocals and corresponding homozygotes. It was established from...
متن کاملParvovirus B19 Infection Frequency in Placenta of Fetal Loss Cases in Children Medical Center, Tehran, Iran
Background and Objectives: Infection with parvovirus may induce spontaneous abortion, non-immune hydrops fetalis, and intrauterine death in full term infants. The aim of this study was to determine the frequency of parvovirus B19 in paraffin-embedded formalin fixed placental tissues in lost fetuses by PCR method and comparison with its frequency in healthy full term neonates as controls. Ma...
متن کاملFetal Loss: A Genetic Insight of the De Novo Accessory Bi-Satellited Marker of Chromosome 22P
Supernumerary Marker Chromosomes (SMC) follow non mendelian fashion in their inheritance, and are reported in variety of phenotypes. Although markers that contain satellites/bi-satellite variations of short arms do not confer any phenotypic alterations, it affects the fertility, vigour and interferes at non-disjunction during cell division and proves lethal to foetus. We report a couple wherein...
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ژورنال
عنوان ژورنال: Human Reproduction
سال: 1997
ISSN: 0268-1161,1460-2350
DOI: 10.1093/humrep/12.6.1321