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Set up Cornell Notes on pg. 61 Topic: 5.2 Mitosis and Cytokinesis Essential Question :

5.2 Mitosis and Cytokinesis. 2.1 Atoms, Ions, and Molecules. Set up Cornell Notes on pg. 61 Topic: 5.2 Mitosis and Cytokinesis Essential Question : 1. Explain why the daughter cells resulting from mitosis are genetically identical to each other and to the original cell?.

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Set up Cornell Notes on pg. 61 Topic: 5.2 Mitosis and Cytokinesis Essential Question :

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  1. 5.2 Mitosis and Cytokinesis 2.1 Atoms, Ions, and Molecules • Set up Cornell Notes on pg. 61 • Topic: 5.2 Mitosis and Cytokinesis • Essential Question: 1. Explain why the daughter cells resulting from mitosis are genetically identical to each other and to the original cell? 1. Explain why the daughter cells resulting from mitosis are genetically identical to each other and to the original cell? Key concept: Cells divide during mitosis and cytokinesis

  2. KEY CONCEPT Cells divide during mitosis and cytokinesis.

  3. Cells must receive a full set of DNA (no more, no less) to work properly

  4. DNA- double stranded molecule made of four different subunits of nucleotides (A,T,C,G) • Chromosome- one long continuous thread of DNA • Each body cell has 46 chromosomes in 23 pairs

  5. DNA andhistones SupercoiledDNA DNA doublehelix Chromatin Chromosomes condense at the start of mitosis. • DNA wraps around proteins (histones) that condense it.

  6. One half of a duplicated chromosome is a chromatid. • Sister chromatids are held together at the centromere. • Telomeresprotect DNA and do not include genes. Old DNA New DNA Pg. 60

  7. Chromosome Sister Chromatid Centromere Telomere

  8. Process of Meiosis Video

  9. Pg. 140-141 in book Classwork • On the provided paper: • Please create a flow map of The Cell Cycle • Please include: • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis TITLE of Phase PICTURE (with color) mitosis • Description of what is happening (in bullets)

  10. Parent cell centrioles spindle fibers centrosome nucleus with DNA • Interphaseprepares the cell to divide (G1, S, G2) • During interphase, the DNA is duplicated. *Not part of mitosis

  11. Mitosis divides a Somatic (body) cell’s nucleus in four phases. • Prophase: chromosomes condense and spindle fibers form.

  12. Metaphase: chromosomes line up in the middle of the cell.

  13. Anaphase: sister chromatids separate to opposite sides of the cell.

  14. Telophase: the new nuclei form and chromosomes begin to uncoil.

  15. Cytokinesis differs in animal and plant cells. • In animal cells, the membrane pinches closed. • In plant cells, a cell plate forms.

  16. How can you remember what goes first? Peter Made A Tiger Cry

  17. Mitosis and Cytokinesis Video (9m37-21m)

  18. Tip to Remember • Mitosis = Mi “TOE” sis • A toe is part of your body • MITOSIS only occurs in your Somatic or BODY cells • Every cell EXCEPT sperm and eggs

  19. Cell Cycle Poster Activity Please draw and explain the part that your group was assigned. Be prepared to share out with the class. • Cell Cycle (5.1) • Interphase • Prophase • Metaphase • Anaphase • Telophase • Cytokinesis TOPIC PICTURE Explanation

  20. Briefly explain why the daughter cells resulting from mitosis are genetically identical to each other and to the original cell.

  21. During Interphase the original cell is preparing for cell division by duplicating (copying) its DNA. During mitosis the chromosomes are split, resulting in 2 nuclei with identical DNA. During cytokinesis the cell fully separates leaving us with two identical daughter cells.

  22. Interphase: (G1, S, G2)

  23. Sponge 1: Please correctly identify the phase of mitosis. 2 1 3 4

  24. Sponge 1: Please correctly identify the phase of mitosis. Anaphase Telophase Prophase Metaphase

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