phase of mitotic division

phase of mitotic division

a. Definition

There are several stages or phases that will be passed by a cell in the breed. The common division of cells is the division of mitosis.

When viewed from the characteristic division of mitosis is the division that produces the cell nucleus into two new tillers (two new cell nuclei). One cell can produce two new daughter cells and have identical properties. The chromosome from the parent will be the same as the new tiller cell. 

The unique fact is the determination of DNA inheritance from generation to generation. Extraordinary!!! There is one phase that the period of time is so short and alternating with other long division phases of this stage is called the interphase stage. 

When we discuss in general, the stage of mitosis is divided into 5 parts, namely prophase, prometafse, metaphase, anaphase, and telofase. Mitotic division is usually followed by the process of cytokinesis, which is a division followed by cytoplasmic division. The process of mitotic cleavage serves to retain genetic factors from one generation to the next.

Actually the first stage starts with profase, but I will escort it with interfase. Due to this stage is the transition from the next stage stage.

1. Interphase: there are 3 periods passed by this stage of early growth, DNA and second growth. The hallmark of this growth is the creation of a pair of centrosomes from a single centrosomal replication.

2. Profase: chromatin yarn yarn will be docked so as to form a chromosome. This can be seen with a light microscope. Furthermore nukelus with nuleolus will vanish. The chromosomes will be duplicated to form a pair of chromatids connected to the centromere. Sentriol will move toward the poles and accompanied by a spindle mitotik (elongation formed from mikrotubul). The microtubule pushes the centrosome to move toward the poles.

3. Prometafase: This phase is an advanced phase of prophase where the cell nucleus is still in the process of elimination and begins to fragment. Here there will be microtubule connectors and non microtubule connectors that have various functions.

4. Metaphase: the longest stage of mitosis is this stage, lasting about 20 minutes or more. The yarn of chromatin (spindle) yarn is very clearly visible. The yarn thread is tied to a centrosome that is already at the pole position that is across. The chromosomes are in the middle or aerial plane. The number of chromosomes in a cell already has 4n chromosomes.

5. Anafase: contrary to the previous stage this phase lasts only a few minutes and is very fast. The binding chromosome had begun to divide suddenly and into two equal parts toward the opposite pole. You could say 2n chromosomes towards the north kutup and 2n other chromosomes in the opposite direction. In line with the separation of these chromosomes menghbabkan elongated cell structure. Until the end of this stage each end of the cell has the same and complete number of chromosomes.

6. Telophase: the position of the chromosome is fitted to the respective poles so that nucleolus (core child) begins to be seen again. Chromatids begin to disappear so that the cytoplasm begins to thicken and the cell membranes begin to separate the two children of the cell. The final stage of this mitosis is that one nukelus produces two nuclei and has identical similarities. On the cytoplasmic thickening will take place cytokinesis process.

7. Cytokinesis: in the cytoplasmic thickening process and separation of the two cells, its prolonged bore occurs in the late stages of telofase. In animal cells, the cell structure is curved and appears to divide the two new sapling cells.