An additional X chromosome
نویسندگان
چکیده
منابع مشابه
X Chromosome Inactivation in Opioid Addicted Women
Introduction: X chromosome inactivation (XCI) is a process during which one of the two X chromosomes in female human is silenced leading to equal gene expression with males who have only one X chromosome. Here we have investigated XCI ratio in females with opioid addiction to see whether XCI skewness in women could be a risk factor for opioid addiction. Methods: 30 adult females meeting DS...
متن کاملTetraploid embryos rescue embryonic lethality caused by an additional maternally inherited X chromosome in the mouse.
Mouse embryos with an additional maternally inherited X chromosome, i.e., disomic for XM (DsXM), cease to grow early in development and have a deficient extraembryonic region. We hypothesized that the underdeveloped extraembryonic region is attributed to two copies of XM that escape inactivation due to maternal imprinting. To examine the validity of this hypothesis and throw more light on the s...
متن کاملCHROMOSOME STRUCTURE X. AN X-RAY EXPERIMENTt
T WAS recently found (NEBEL and RUTTLE, in press) that Tradescantia I reflexa Raf. shows four threads1 per chromosome during all somatic as well as during all premeiotic stages. Multiplication of threads occurs a t metaphase during somatic division (fig. I). In meiosis of T . reflexa the four threads multiply a t early interkinesis and do not do so again until the metaphase of the first pollen ...
متن کاملIXDB, an X chromosome integrated database (update)
Chromosome specific databases are an important research tool as they integrate data from different directions, such as genetic and physical mapping data, expression data, sequences etc. They supplement the genome-wide repositories in molecular biology, such as GenBank, Swiss-Prot or OMIM, which usually concentrate on one type of information. The Integrated X Chromosome Database (IXDB, http://ix...
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ژورنال
عنوان ژورنال: South African Medical Journal
سال: 2014
ISSN: 2078-5135
DOI: 10.7196/samj.9266