X-Ray Inhibition of Mitosis in Relation to Chromosome Number
نویسندگان
چکیده
منابع مشابه
morphology, geochemistry, mineralogy, and micromorphology of soils of hormozgan province in relation to parent materials
ویژگی های زمین شیمیایی، کانی شناسی، و میکرومورفولوژیکی خاک ها و سنگ مادر مربوطه در منطقه بین بخش های جنوبی زاگرس و خلیج فارس تا دریای عمان(استان هرمزگان، ایران) مورد بررسی قرار گرفت. هدف های این مطالعه شناسایی تغییرات در خصوصیات فیزیکی، شیمیایی، و ترکیب کانی شناسی خاک، مطالعه میکرومورفولوژی و تکامل خاک، و بررسی توزیع عنصر خاک بر اساس هوازدگی، پروسه های خاک و زمین شناسی جهت توصیف اثرات مواد مادر...
15 صفحه اولCHROMOSOME 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 کاملChromosome Number Variation in Iranian Populations of Acorus calamus
Different ploidy levels, diploid (2n=2x=24) to hexaploid (2n=6x=72) have been reported for Acorus calamus, a perennial medicinal plant. According to available information, there is a significant relationship between the ploidy level and essential oil compositions and medicinal properties of this important genetic resource. However, there is no information about the chromosome number of A. calam...
متن کاملX 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...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1944
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.30.9.231