![]() Interphase is the time that elapses between one M phase and the next. The period of DNA synthesis (S phase) involves the replication of chromosomal DNA this is followed by another time gap (G2 phase), after which mitosis (M phase) occurs. The cell is metabolically active during this part of the cycle in which proteins and DNA precursors are made. After each division, there is a time gap (G1 phase) before the synthesis of DNA begins. Eukaryotes from yeast to humans have similar cell division phases, termed G1, S, G2, and M phases. In prokaryotes, the cell cycle consists of successive periods of DNA replication and of cell division in which a cell wall forms and divides the cell in two, with no visible condensation and decondensation of DNA. Prokaryotic and eukaryotic cells differ markedly in the coordination of deoxyribonucleic acid (DNA) synthesis and in the subsequent equal partitioning of DNA during cell division. See also: Cell (biology) Cell biology Cell cycle Mitosis ![]() The relatively short period of mitosis (nuclear division) provides an interlude during which the actual process of visible division into two daughter cells is accomplished. A relatively long interphase represents the time during which the cell engages in synthetic activities and reproduces its components, even though there is no visible change. The cell cycle can be divided into two parts. The cell division cycle, more commonly and simply known as the cell cycle, comprises the period between the formation of a cell as a progeny of division and its own subsequent division into two daughter cells. Cell division is the process by which living cells multiply ( Fig. The division of a cell into daughter cells that receive identical copies of its genetic material. Prokaryotic and eukaryotic cells differ markedly in the coordination of DNA synthesis and in the subsequent equal partitioning of DNA during cell division. Mitosis is divided into six distinct stages: prophase, prometaphase (or late prophase), metaphase, anaphase, telophase, and cytokinesis. To calculate the miotic index is by dividing the number of cells in metaphase by the total number of cells counted.Cell division is the process by which living cells multiply.ĭuring cell division, a cell divides into daughter cells that receive identical copies of its genetic material.ĭuring the relatively short period of mitosis, the actual process of visible division into two daughter cells is accomplished. briefly describe how you would calculate miotic index?.For example it is used to predict mainly cancerous cells The purpose of measuring mitotic index is a way of predicting cells. what is the purpose of measuring mitotic index?.By definition mitotic index it is the ratio between the number of cells in a population that undergoes mitosis to the number of cells. Three functions of mitosis are asexual reproduction, growth and repair. This step is also where cytokinesis occurs, chromosomes uncoil, nuclear envelop forms again and spindle fibers disappear. Telophase is the last step where there are two complete sets of chromosome at each of the sides of the cell. Anaphase is where the centromeres are split and the sister chromatids are separated from each other. ![]() Metaphase is where the chromosomes are aligned at the metaphase plate. Prometaphase is where the condensed chromosomes move to the center and where spindle fibers bind to the kinetochore and begin moving the chromosomes. Prophase is where the chromosomes condense and becomes more visible and this is where the nuclear envelop breaks down. The phases of Mitosis involves prophase, prometaphase, metaphase, anaphase and telophase. Mitosis is a cell division that results with the same number of chromosomes as the parent cell.
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