2000 Assessing the chromosome copy number in metaphase II oocytes by sequential fluorescence in situ hybridization. Journal of Assisted Reproduction and Genetics 10, 596-602.Assessing the Chromosome Copy Number in Metaphase II Oocytes by Sequential Fluorescence in Situ Hybridization[J] . Marielle Vollmer...
Chromosome number, precise number of chromosomes typical for a given species. In most sexually reproducing organisms, somatic cells are diploid, containing two copies of each chromosome, while the sex cells are haploid, having one copy of each chromosome
they are still attached at thecentromereand are not yet considered separate chromosomes. Thus, the above picture representsone chromosome, but two chromatids. During prophase and metaphase of mitosis, each chromosome exists in the above state. For humans, this...
and the two separate daughter chromosomes, as they are now known, move to the poles of the cell, so that one of each is incorporated into the daughter cells. Previous to metaphase, the chromosomes are inprophase, and appear much longer and thinner, and the separation into separate chromatid...
First, the number of chromatin fibres with diameter >25-nm were the minority, indicating that thick chromatin fibres were not involved in the construction of higher-order structures of chromosomes at the metaphase stage. Second, the mean value of diameters of the chromatin fibres was 16.9 ±...
b C-banded metaphase and DAPI staining of the exceptionally large W chromosome of the Western mosquitofish. Note that except the centromeric region, the large W chromosome is not heterochromatic Full size image In the Asian ricefish of the genus Oryzias all species have a well-defined genetic ...
A CYTOLOGICAL search for a sex chromosome mechanism in Myristica fragrans , the common nutmeg tree, has revealed some meiotic peculiarities. Mitotic metaphase counts in this admittedly unfavourable material usually gave a number of 44 sm... M Flach - 《Nature》 被引量: 65发表: 1966年 Comparative...
Tjio and Levan's initial chromosome preparations offered relatively poor resolution of metaphase chromosomes. The gross morphology of the chromosomes was apparent, but few other distinguishing features were clear. Nonetheless, Tjio and Levan's determination of a human diploid number of 46 chromosomes was...
The number 2n = 24 previously raported in 9 species appears to result from a break of the chromosome first pair very often observed in the Eucalyptus in the metaphase and especially premetaphase stage.doi:10.1080/00087114.2006.10797916Oudjehih, Bachir...
By prometaphase-I (f), no RNA pol-II signal is detected. Bar represents 10 μm. (PNG 2773 kb) High resolution image (TIF 2940 kb) Supplementary Figure 3. Immunolocalization of SYPC3 (red) and RPA (green) in E. tancrei spermatocytes. a. Leptotene. RPA appears as discrete foci ...