Cell Division Q1f PDF

CELL DIVISION Q1f What do you observe? What do you know? Objectives 1. Describe the stages of mitosis and meiosis. 2. Compare mitosis and meiosis, and their role in the cell-division cycle. 3. Explain the significance or applications of mitosis and meiosis. What is MITOSIS? A type...

CELL DIVISION Q1f What do you observe? What do you know? Objectives 1. Describe the stages of mitosis and meiosis. 2. Compare mitosis and meiosis, and their role in the cell-division cycle. 3. Explain the significance or applications of mitosis and meiosis. What is MITOSIS? A type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus Occurs in all the somatic (body) cells 1. PROPHASE ∙ Chromosomes coil up ∙ Nuclear envelope disappears ∙ Spindle fibers form 2. METAPHASE ∙ Chromosomes line up in middle of cell ∙ Spindle fibers which branch out of the centrioles connect to chromosomes 3. ANAPHASE ∙ Chromosome copies divide ∙ Spindle fibers pull chromosomes to opposite poles 4. TELOPHASE ∙ Chromosomes uncoil ∙ Nuclear envelopes form ∙ 2 new nuclei are formed ∙ Spindle fibers disappear What is MEIOSIS? A type of cell division that results in 4 daughter cells each having half the original amount of genetic information as the parent nucleus Occurs in the gamete (reproductive cells) Meiosis I Meiosis II COMPARE AND CONTRAST Mitosis: plant cell vs animal cell Meiosis 1 vs Meiosis 2 Mitosis vs Meiosis  How do you compare meiosis in plant cells and in animal cells? Why is mitosis important? 1. Development and growth 2. Cell repair and replacement 3. Asexual reproduction Why is meiosis important? 1. It allows the sexual reproduction of diploid organisms. 2. It enables genetic diversity. 3. It aids in the repair of genetic defects. Is mitosis (or meiosis) a perfect process? Does this process complete itself without any problems all the time? Why do you think so? Common Errors in Cell Division ASSESSMENT  1) This refers to the series of changes a cell goes through from the time it is formed until it divides. A. Cell Cycle B. Cell Cytosis C. Cell Formation D. Cell Morphology  2) The division of nucleus is known as ________. A. Karyokinesis B. Plasmokinesis C. Cytokinesis D. Ketokinesis  3) The DNA is abundantly located in the ___________. A. Nucleus B. Ribosome C. Cytoplasm D. Mitochondria  4) Long and thread-like DNA in a non-dividing cell is called ___________. A. Chromatid B. Chromatin C. Chromatophose D. Chromatophore  5) The body cell is called ___________. A. Senetic B. Somatic C. Karyonic D. Metronomic  6) Which is also known as the resting stage before mitosis? A. Prophase B. Telophase C. Interphase D. Metaphase  7) Each chromosome is made up of two strand-chromatid held by a button-like structure called __________. A. Centriole B. Centropode C. Centromere D. Centrosomes  8) A stage in mitosis where the spindle fibers form A. Metaphase B. Interphase C. Anaphase D. Prophase  9) A short stage in mitosis characterized by the alignment of chromosomes at the center A. Metaphase B. Interphase C. Anaphase D. Prophase  10) It is the process by which gametes with half the number of chromosomes are produced. A. Mitosis B. Meiosis C. Cytosis D. Gametosis  11) A stage in meiosis where sister chromatids separate from each other A. Anaphase I B. Anaphase II C. Prophase II D. Prophase I  12) What kind of cell is involved if a cell plate appears across the middle of the cytoplasm? A. An animal cell in telophase B. An animal cell in metaphase C. A plant cell undergoing cytokinesis D. A plant cell undergoing metaphase  13) Which statement is TRUE about mitosis and meiosis in plant and animal cells? A. Plant cells perform mitosis while animal cells undergo meiosis. B. Most plant and animal cells undergo mitosis. However only plants can undergo meiosis. C. Most plant and animal cells undergo mitosis. However only animals can undergo meiosis. D. Most plant and animal cells undergo mitosis. Both plants and animals can undergo meiosis.  14) A disease in which some of the body’s cells grow uncontrollably and spread to other parts of the body. A. Cancer B. Genetic displacement C. Cytosis D. Chromosomal abberation  15) Which of the following is NOT an application of mitosis? A. Reproduction B. Production of gametes C. Growth and development D. Repair of damaged tissues CLOSING