Mitosis Phase

Later in the G1 phase, at a time referred to as the restriction point, cells undergo an internal evaluation of their ability to complete the cell cycle and produce two viable daughter cells. If the evaluation is negative, the cell does not go onto the mitosis stage but rather exits the cell cycle to enter a non-divided stage referred to as the GO phase. If the evaluation is positive, the cell becomes committed to DNA replication and mitosis. The restriction point can also be thought of as a point of no return for cell division. If a cell is going on to mitosis, it begins to produce proteins called histones that are critical in organizing and condensing chromosomes during mitosis. As the production of histones peaks, the S phase of interphase begins. During the S phase, duplicate copies of each chromosome are synthesized, this processes can take a while as many eukaryotes have a large number of very long chromosomes. For example, human cells have to duplicate 46 chromosomes each one thousand to five thousand times the diameter of the nucleus in length when stretched. After

Centrioles pull the chromosomes to opposite polls in animal cells. Meristems are areas in which plant cell division occurs. In this area either one of two things will happen. The tips will either become longer, or the width will increase. There is division amongst cells within animals in all places. Cytoplasmic division occurs differently in plant cells. Two daughter cells are split by building new cell walls instead Plants divide the two daughter cells by building new cell walls. One of the key differences takes place during the last phase of mitosis. Cytokinesis is not exactly the same concerning plant an animal cells. Animal cells undertake what is called cell furrowing while plant cells undergo plant formation. The main alteration is the cell wall within the plant. It forms a rigid wall that cannot be pinched unlike animal