Chromosome replication

Accurate chromosomal DNA replication during the S phase of the cell cycle is an important element in the transmission of the genome from generation to generation. The current "every cell cycle" eukaryotic chromosomal repeat model is a highly regulated process in which time-regulated replicon subclusters are activated continuously, followed by combining to form two semi-conservative copies of the genome Is described. The copy sub-cluster or copy domain consists of individual copy units that are synchronously activated at a given point in time during the S phase.

Mitosis itself consists of many stages. The first phase is interval. At this stage, the chromosome is not reproduced because it is duplicated. Chromosomal replication allows each chromosome to consist of two identical sister chromatids linked by centromere. The number of chromosomes is the same as before, but now there are twice as many genetic information. The central body replicates and the nuclear membrane remains. Nuclear bodies can also be seen. The next step is the previous stage. At this stage, the chromosome will condense. Nuclear bodies and nuclear membranes disappeared. A spindle device consisting of spindle fibers is formed and the central particles are separated. Each chromosome is attached to the spindle fiber. The next stage of mitosis is the metaphase during which the chromosomes align in the center of the cells and are pulled by the spindle fibers. This will be followed by the period. Currently isolated chromosomes are now called chromosomes. The final stage of mitosis is the final stage

Pre-stage: During the first mitosis, the nucleolus gradually disappears and chromatin (replicated DNA and related proteins) condense on the chromosome. Each replicating chromosome contains two chromatids, both of which have the same genetic information. Cytoskeletal microtubules are involved in cell shape, movement, and attachment and degradation with other cells during interphase. And these microtubule components are used to grow the mitotic spindle from the central body region. Middle-metaphase: At this stage nuclear membranes rupture so there is no more discernable core. Several mitotic spindle fibers extend from the centromere and attach to the centromere, a protein bundle within the centromere region of the chromosome, where the sister chromatids are bound together. Other spindle fibers are elongated but not attached to chromosomes, but overlap each other at the center of the cell.

These are plasmids containing sequences surrounding the centromere region of the chromosome, which is similar to the yeast replicating plasmid and has an autonomously replicating sequence (ARS). Since all spontaneous vectors such as YEp, YIp, YCp, YRp exist as cyclic DNA molecules in yeast, they are not similar. The ends of all chromosomes of normal yeast chromosome yeast having a linear structure are also expressed as lines It has the same telomere as eucaryotic chromosome. It has two telomeres, one on the left side and the other on the right side, thus preventing degradation and necessary for chromosomal replication. The origin of replication of the "ori" site on the plasmid is the site where DNA replication starts. The presence of yeast centromere contributes to proper separation of chromosomes