The cell grows during interphase, and DNA is recycled.
The cell cycle is an orderly sequence of cell growth and cell division events that produce two new daughter cells. Cells on the road to cell division proceed through a sequence of correctly timed and carefully regulated growth stages, DNA replication, and division that produce two identical (clone) cells.; There are two major phases in the cell cycle: interphase, and mitotic. The cell grows during interphase, and DNA is recycled. The replicated DNA and cytoplasmic contents are divided during the mitotic phase, and the cell divides. [Image will be Uploaded Soon] Cell Cycle The sequence of events by which a cell duplicates its genome, synthesizes the cell’s other constituents and subsequently divides into two daughter cells is called the cycle of cells. The cell cycle comprises three co – ordinated processes of cell division, DNA replication and cell growth. Cell cycle period can vary from organism to organism, and from cell type to cell type. (E.g., 90 minutes in the yeast cell cycle, 24 hours in humans.) [Image will be Uploaded Soon] Interphase Interphase is divided into 3 additional phases: “G1” phase, “S” phase, and “G2” phase. G1 Phase (Gap 1 Phase)
G2 Phase (Gap 2 Phase) In preparation for mitosis, proteins are synthesized whilst cell growth continues. [Image will be Uploaded Soon]
Cell Division Mitosis or M phase In animals, division of mitotic cells is only seen in the diploid somatic cells, while mitotic divisions in both haploid and diploid cells can be seen in the plants. It is also called an equational division, as the number of parent and progeny cell chromosomes is identical. Mitosis is Subdivided into the Following 4 Stages:
[Image will be Uploaded Soon] Meiosis
[Image will be Uploaded Soon] Metaphase I:
Meiosis II Meiosis II resembles a normal mitosis. Prophase II:
Metaphase II: At this point the chromosomes align at the equator, and the microtubules from opposite spindle poles are bound to the sister chromatid kinetochores. Anaphase II:
[Image will be Uploaded Soon] Importance of Cell Division: Significance of Mitosis
Cell division is just one of several stages a cell experiences during its lifetime. The cell cycle is a repeating series of events including growth, synthesis of DNA, and division of the cells.
The cycle of cells is a four – stage process consisting of Gap 1 (G1), Synthesis, Gap 2 (G2), and Mitosis.
The primary mechanism by which organisms create new cells is through division of the cells. A single “parent” cell can divide and produce identical “daughter” cells during that cycle. The parent cell passes its genetic material on to each of its daughter cells, therefore.
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