PPT – THE CELL CYCLE AND CELL DIVISION PowerPoint presentation | free to view - id: bNzE0Z
Cell Cycle and Cell Division 1. Prepared By; Shivang Patel. Cells are the basic frde of all living things. Cells make up bones, muscles, skin, and blood. Cells make up leaves, roots, stems, and flowers. As the organism grows, the cells must reproduce. Functions of cell…. Nutrients to Energy.
Each cell having its own set of instrunction. They have a single circular chromosome. Prokaryotes simply divide their cells in two by binary fission. Centromere -The most condensed and constricted region of a chromosome, to which the spindle fiber is attached during mitosis.
Chromatid -Either of the two daughter strands of a replicated chromosome that are joined by a single centromere and separate during cyce division to become individual chromosomes. Chromosomes are composed primarily of DNA and protein. They are visible only under magnification during certain stages of cell division.
Humans have 46 chromosomes in each somatic cell and 23 in each sex cell. They are; interphase, mitosis prophasemitosis metaphasemitosis anaphasemitosis telophaseand cytokinesis This, coupled with cytokinesis division of the cytoplasmoccurs in all multicellular plants and animals to permit growth of the organism.
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Each replicated chromosome comprises two chromatids, both with the same genetic information. Once separated, sister chromatids, each now an independent chromosome with its own centromere, begin moving apart toward opposite poles of the cell. The movement is made possible via two mechanisms. The kinetochore fibers attached to each centromere begin to shorten, pulling the chromosomes toward the poles.
At the same time, the polar microtubules from opposite ends of the cell form cross bridges in the equatorial plane, pushing the poles apart by becoming longer. After complete divisjon of the chromosomes the nuclear membrane begins to reform around each group of chromosomes at the opposite ends of the cell.
When telophase is complete and the new cell membrane is being formed. The final steps in telophase involve the initiation of plasma membrane cleavage between each of the new daughter ctcle to ultimately yield two separate cells during ctcle, the next phase of cell division.
As the nuclear envelope is reforming and the chromosomes are de-condensing.Eukaryotic Cell Cycle – Cell grows. – DNA is replicated. - Mitotic cell division produces daughter cell identical to the parent. – The timing of replication and cell division is highly regulated. Image: Cell cycle by Richard Wheeler From the Virtual Cell Biology Classroom on couponia.co Like prokaryotic cell cycle, in that File Size: 1MB. Notes: Cell Division - Notes: Cell Division Objective: Know the 6 stages of the cell cycle. Read pgs. Cell Cycle Cell cycle - the regular sequence of growth and division of a cell. | PowerPoint PPT presentation | free to view. During cytokinesis, the cytoplasm is divided into separate cells.. The process of cytokinesis differs in animal and plant cells. 0. Cell division is a continuum of dynamic changes. Teaching Tips. Students might keep better track of the sequence of events in a cell cycle by simply memorizing the letters IPPMAT: the first letters of interphase, prophase, prometaphase, .
During this stage the cytoplasm is divided. Total views 58, During the cell cycle, a cell grows, prepares for division, and divides to form two daughter cells. The Prokaryotic Cell Cycle. The prokaryotic cell cycle is a regular pattern of growth, DNA fgee, and cell division. Most prokaryotic cells begin to replicate, or copy, their DNA once they have grown to a certain size.
When DNA replication is complete, the cells divide through a process known as binary fission.
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Binary fission is a form of asexual reproduction during which two genetically identical cells are produced. For example, bacteria reproduce by binary fission. The Eukaryotic Cell Cycle. Donwload eukaryotic cell divisoon consists of four phases: G1, S, G2, and M. Interphase is the time between cell divisions. It is a period of growth that consists of the G1, S, and G2 phases.
The M phase is the period of cell division. G 1 Phase: Cell Growth. In the G 1 phase, cells increase in size and synthesize new proteins and organelles.
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In the S or synthesis phase, new DNA is synthesized when the chromosomes are replicated. G 2 Phase: Preparing cyccle Cell Division. In the G 2 phase, many of the organelles and molecules required for cell division are produced. M Phase: Cell Division. In eukaryotes, cell division occurs in two stages: mitosis and cytokinesis. Mitosis is the division of the cell nucleus.
Cytokinesis is the division of the cytoplasm.
Cell Cycle and Cell Division
What events occur during each of the four phases of mitosis? During prophase, the genetic material inside the nucleus condenses and the duplicated chromosomes become visible. Doenload the nucleus, a spindle starts to form. During metaphase, the centromeres of the duplicated chromosomes line up across the center of the cell.
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