seeking out attachment sites at chromosome kinetochores, which are complex platelike structures that assemble during prometaphase on one face of each sister chromatid at its centromere.

Each chromosome is, at this time, actually two identical copies. Each copy is called a chromatid. A spindle begins to form from the centrioles. This spindle is made of fibers. The centrioles begin ...

As in mitosis, each chromatid is now considered a separate chromosome (Figure 6). This means that the cells that result from meiosis II will have the same number of chromosomes as the "parent ...

The stages outlined in the following example show a cell with a diploid chromosome number of four (two sets of two chromosomes) undergoing cell division. The replicated chromosomes are not visible ...

Chromatid aberrations in peripheral leukocytes ... Moreover, although it is not known in what stage the chromosomes of reticuloendothelial-tissue stem cells or precursors of peripheral leukocytes ...

Science DNA breaks are toxic lesions for the cell. In order to repair these breaks, it is necessary, starting from the break ends, to find a homologous sequence within the vastness of the genome. In ...