Cheilanthes tomentosa (Alabama) shows 90 units at metaphase of meiosis and approximately the same number during mitosis in the crozier cells. It has 32 spores and our plant is an apogamous triploid. Both Cheilanthes siliquosa (Washington) and C. californica (California) show 30 pairs at ...
The visibility of the stained chromosomes is highest during the first half of mitosis, when the cells are beginning to divide at metaphase. During this phase of highest visibility, each chromosome is longitudinally paired (it consists of two identical copies); each duplicate of the chromosome is ...
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...
Meiotic abnormalities were observed included a varying degree of sticky chromosomes with laggards, precocious division of centromeres in metaphase I, bridges in anaphase I and multipolar cells in telophase II.Conclusion Morphological features support the separation of Onobrychis avajensis Ranjbar as a ...
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 article presents a study on the chromosome number analysis on the Japanese sea cucumber, Apostichopus japonicus, using fluorescence in situ hybridization (FISH) technique. A total of 250 metaphase plate were photographed, on which the total chromosomes counted ranged from 29 to 46, with a ...
Metaphase chromosome spreads were obtained from the head kidney of female and male fish and were then passed through an ethanol series and air dried. Thedmrt1BAC DNA was extracted and labeled by nick translation using a Nick Translation System (DIG-Nick Translation Mix, Roche). The BAC FISH ...
The size ofmetaphase chromosomesvaries from less than 1μm to more than 10μm, but upper and lower tolerance limits forchromosome sizeare apparently determined by thegenome size,chromosome numberandkaryotypestructure of a given species. In both dicots [2] andmonocots[3],chromosome armslonger than...
The basic chromosome number of the genus was x = 17. In this study, polyploidy was determined in nine taxa of Jurinea. Polyploid cells were 2n = 4x = 68 and they were tetraploid. The mitotic metaphase plates were given all the taxa of Jurinea. The research has made contribution to ...
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 ±...