the quality of Bulla walnut is better than the others by selection and comparison,which is suitable extension on a country scale.Taking multiple selection method,97 superior individual plants are selected among 127 superior individual plants.Based on analysis of the effects of stereo climate in snow...
The giant sex chromosomes can be easily identified in spermatogonial mitosis. The size of each chromosome, however, varies according to stage and fixation, so that it is useless to make absolute chromosome measurements. At mitotic metaphase, however, after acetic-alcohol fixation and Feulgen staining...
This type of F~ phosphorylation is evidently characteristic of metaphase and is not an artifact of the drugs used to obtain the metaphase cells (3,...Lake, RS (1973) F1-histone phosphorylation in metaphase chromosomes of cultured Chinese hamster cells. Nature (New Biol.) 242: pp. 145...
The degree of compactness of chromosomes is highly flexible and depends on the stage of cell cycle. They are distinctly visible in the mitotic phase (particularly in metaphase), whereas in interphase they are present as indistinct entangled chromosomes fibers called chromatin. Most of the present un...
In situ hybridization of genes on metaphase chromosomes with non-radioactive probes at the EM levelSimple Lie groupsControllabilityInvariant vector fieldsRoot systemsA 37-year simulation of global climate by a 9-level GCM on an 8 degrees x10 degrees grid showed realistic interannual variation of the...
This ensures proper alignment of homologous at the metaphase I spindle and segregation in daughter cells. If CO formation fails, meiotic chromosomes segregate randomly, with consequent meiotic arrest and infertility due to activation of the Spindle Assembly Checkpoint (SAC) mechanisms of selection [25,...
They are made up of chromatin and are visible during cell division, particularly in the metaphase stage. 2. Identifying the Centromere: - The centromere is a constricted region of the chromosome that plays a crucial role during cell division. It is the point where the two sister chromatids ...
Finally, chromosomes in the metaphase of meiosis contain a larger amount of material. Although extensive research has been devoted to chromosomes, the study of their structural and functional organization remains one of the most urgent tasks of modern biology. Chromosomes perform highly complex ...
The word chromosome comes from the Greek χρῶμα (chroma, color) and σῶμα (soma, body) due to their property of being very strongly stained by particular dyes. Diagram of a duplicated and condensed metaphase eukaryotic chromosome. (1) Chromatid – one of the two identical parts ...
Both photographs represent gemini at the metaphase of the first division of the spore mother cells; Fig. l(a) is a photomicrograph of a pair of chromosomes united by a single sub-terminal chiasma, Fig. 1(b) is a photomicrograph of a pair joined by two chiasmata, one at each end. ...