Mitosis Meiosis http www youtube comwatch vb Ky
![Mitosis/ Meiosis http: //www. youtube. com/watch? v=-b. Ky. T 5_s_d. E SC. 912. L. Mitosis/ Meiosis http: //www. youtube. com/watch? v=-b. Ky. T 5_s_d. E SC. 912. L.](https://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-1.jpg)
Mitosis/ Meiosis http: //www. youtube. com/watch? v=-b. Ky. T 5_s_d. E SC. 912. L. 16. 14 • describe the specific events that occur in each of the stages of the cell cycle (which include the phases of mitosis: ) – interphase (Gap 1, Synthesis, Gap 2) – prophase – metaphase – anaphase – telophase – cytokinesis • explain how new cells are created through mitosis • explain why maintaining chromosome number during asexual reproduction is important SC. 912. L. 16. 8 • describe cancer as uncontrolled cell growth that may have resulted from mutations affecting cell cycle-regulating proteins SC. 912. L. 16 • describe the process of meiosis, including independent assortment and crossing over • explain how reduction division results in the formation of haploid gametes or spores SC. 912. L 16. 17 • differentiate the processes of mitosis and meiosis • model or diagram the process of mitosis and meiosis • explain how sexual and asexual reproduction may contribute or limit genetic variation
![Cell Cycle • Gap 1 (G 1)- cells perform normal function, cells grow and Cell Cycle • Gap 1 (G 1)- cells perform normal function, cells grow and](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-2.jpg)
Cell Cycle • Gap 1 (G 1)- cells perform normal function, cells grow and replicate organelle; checkpoint • Synthesis (S)- cell synthesizes a whole new copy of DNA (in nucleus in eukaryotic cells), at end of stage there are two copies of DNA • Gap 2 (G 2)- additional growth; second checkpoint • Mitosis (M)- two parts: mitosis and cytokinesis – Mitosis is division of cell nucleus and DNA inside – Cytokinesis is division of contents (cytoplasm) Interphase
![What are the stages of mitosis and how do they produce identical copies of What are the stages of mitosis and how do they produce identical copies of](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-3.jpg)
What are the stages of mitosis and how do they produce identical copies of cells? Mitosis= cell division Before Cell Division ▫ Interphase- Chromosomes duplicate, cell prepares for mitosis Mitosis Stages PMAT ▫ Prophase- Chromosomes condense ▫ Metaphase- Chromosomes meet in the middle ▫ Anaphase- Chromosome pull away ▫ Telophase- cell separating ▫ Cytokinesis- Separation of cells is complete
![How does mitosis maintain the chromosome number in the parent cells? • The chromosomes How does mitosis maintain the chromosome number in the parent cells? • The chromosomes](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-4.jpg)
How does mitosis maintain the chromosome number in the parent cells? • The chromosomes duplicate (make a copy of) themselves before cell division or mitosis. – Occurs in interphase, when the cell is preparing to divide.
![How does mitosis allow for asexual reproduction? • Mitosis is making an exact copy How does mitosis allow for asexual reproduction? • Mitosis is making an exact copy](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-5.jpg)
How does mitosis allow for asexual reproduction? • Mitosis is making an exact copy of the cell. In my mitosis there no exchange or recombination of DNA. – Examples of Asexual Reproduction: Cutting off a piece of plant and replanting it, budding, and binary fission in bacteria.
![What are the steps in meiosis that result in the formation of haploid gametes? What are the steps in meiosis that result in the formation of haploid gametes?](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-6.jpg)
What are the steps in meiosis that result in the formation of haploid gametes? • Haploid= half the number of chromosomes ▫ Ex: Human gametes are haploid (23 chromosomes) • The chromosomes in the original cell duplicate and the cell then goes through two cell divisions. http: //www. youtube. com/watch? v=Ba 9 LXKH 2 zt. U&feature=related
![Why is meiosis necessary for sexual reproduction and how does it allow for creating Why is meiosis necessary for sexual reproduction and how does it allow for creating](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-7.jpg)
Why is meiosis necessary for sexual reproduction and how does it allow for creating genetic diversity? • Meiosis creates gametes. • Each cell created as a result of meiosis are different because of independent assortment and crossing over
![How are mitosis and meiosis similar but different? Mitosis Meiosis Starts with 1 diploid How are mitosis and meiosis similar but different? Mitosis Meiosis Starts with 1 diploid](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-8.jpg)
How are mitosis and meiosis similar but different? Mitosis Meiosis Starts with 1 diploid cell Ends with 2 diploid cells Starts with 1 diploid cell Ends with 4 haploid cells Occurs in somatic cells Creates gametes (sex cells) Creates cells that are identical Creates cells that are genetically different
![How can independent assortment and crossing over occur during meiosis? • Both crossing over How can independent assortment and crossing over occur during meiosis? • Both crossing over](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-9.jpg)
How can independent assortment and crossing over occur during meiosis? • Both crossing over and independent assortment results in genetically unique gametes • Crossing over -the exchange of chromosome pieces between homologous chromosomes. –.
![Independent Assortment • Independent assortment- Chromosomes can arrange themselves independently during meiosis. Independent Assortment • Independent assortment- Chromosomes can arrange themselves independently during meiosis.](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-10.jpg)
Independent Assortment • Independent assortment- Chromosomes can arrange themselves independently during meiosis.
![Canceruncontrolled cell growth that may have resulted from mutations affecting cell cycleregulating proteins Canceruncontrolled cell growth that may have resulted from mutations affecting cell cycleregulating proteins](http://slidetodoc.com/presentation_image_h/070c8b7af8ff94588af807b5587b77b0/image-11.jpg)
Canceruncontrolled cell growth that may have resulted from mutations affecting cell cycleregulating proteins
- Slides: 11