Mitosis vs. Meiosis Cell Division is the process of dividing a parent cell into multiple daughter cells by using the Cell Cycle. The Cell Cycle itself is composed of the Interphase‚ usually Mitosis‚ and Cytokinesis. The Interphase‚ which takes up 90% of the Cell Cycle‚ is composed of three phases: Growth 1 (G1)‚ Synthesis (S)‚ and Growth 2 (G2). In the G1 phase‚ the cell grows its size‚ replicates any organelles‚ and functions normally. In the S phase‚ it would prepare to divide its nucleus. Lastly
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Unit1: Cell functions/ Cell division Cells Cell theory: -All living things are composed of one or more cells. -The cell is the smallest entity that retains the properties of life. -New cells arise only from cell that already exists. Structure of the cell: The outer boundary (plasma membrane) similar to a city wall It is constructed with molecules called lipids (fat and oils) The cell membrane is composed of: -Proteins and Lipids -FUNCTION: to allow molecules into and out of the
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Mastering Concepts 8.1 1. Explain the roles of mitotic cell division‚ meiosis‚ and fertilization in the human life cycle. Mitosis allows for growth and repair from the fertilized egg to the adult. In reproductively mature individuals‚ meiosis creates gametes with half the genetic material. The male gamete then fertilizes the female gamete during sexual reproduction‚ forming a zygote with a full set of genetic material. 2. Why are both cell division and apoptosis necessary for the development
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Cells‚ Cell Division‚ and Cell Specialization Fundamentally Different Types of Cell Prokaryotic Cell- single celled: only DNA+ structure (“before nucleus”) E.g. zygote-complete DNA Eukaryotic Cell-multi-celled (“after nucleus”) Prokaryotes Eukaryotes DNA In “nucleoid” region Within membrane-bound nucleus Chromosomes Single‚ circular Multiple‚ linear Organelles None Membrane-bound organelles Size Usually smaller Usually larger- 50 times Organization Usually single-celled Often multicellular
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1. Introduction Microscopy is an essential technique not only in cell biology but natural science as a whole. We compared different types of microscopic techniques ‚ according to the specimen used and the scope of the experiment. Two specimens‚ stained and unstained‚ containing CHO cells‚ were prepared‚ examined and analyzed under the microscope using bright field (HF)‚ dark field (DF) and phase contrast (PH) settings. In addition‚ the four phases of cell division cycle were estimated.. Bright
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HOW CAN CANCER CELLS BE RECOGNIZED? NAME: _______________________________ DATE: __________________ BLOCK: _______ Purpose: In this investigation you will explore the similarities and differences between the cell cycles of normal cells and cancer cells. Procedure: 1. Open your Internet Browser and navigate to the following URL: http://glencoe.mcgraw-hill.com/sites/0078695104/student_view0/unit2/chapter9/virtual_labs.html 2. Click on CELLULAR REPRODUCTION TV/VCR 3. Click on the TV/VCR. a. b.
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Notes: Anatomy & Physiology 1. Cells A cell is the basic‚ living‚ structural‚ and functional unit of the body. Cytology: the study of cells A generalized view of the cell 3 main parts of the cell: Plasma membrane‚ cytoplasm and nucleus. * Plasma (cell) membrane: * Outer‚ limiting membrane separating the cell `s internal components from the extracellular materials and external environment. * Cytoplasm (formed or molded): * Consist of all the cellular contents between
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which results in the production of four haploid cells. Mitosis: A process which replicates chromosomes exactly so that each of the daughter cells contains identical information. The process of mitosis involves five stages. The five stages are: Interphase‚ Prophase‚ Metaphase‚ Anaphase and Telophase respectively. Meiosis: A process whereby two successive nuclear divisions will produce four haploid cells. There are two rounds of cell
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During which phase of the cell cycle does DNA duplication‚ or replication‚ take place? – interphase When a double helix of DNA is replicated‚ two complete helices are formed. Together‚ these helices are called sister __________. – chromatids During which phase of mitosis do sister chromatids line up at the center of the cell? – metaphase During which phase of mitosis do the sister chromatids move apart? – Anaphase During which phase of mitosis do nuclear envelopes and the nucleoli reappear?
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Tissue Type # Cells in Interphase # Cells in Prophase # Cells in Metaphase # Cells in Anaphase # Cells in Telophase Lung Tissue Sample 1 19 1 0 0 0 Lung Tissue Sample 2 19 0 0 1 0 Stomach Tissue Sample 1 18 0 1 0 1 Stomach Tissue Sample 2 16 1 1 0 2 Ovarian Tissue Sample 1 17 0 1 2 0 Ovarian Tissue Sample 2 19 0 0 1 0 Table 2: Record your data for the number of cells in each stage of the cell cycle observed in cancerous tissues. Tissue Type # Cells in Interphase # Cells in Prophase # Cells
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