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Science project 1st period Mrs. Jennings By: Christasia, Maddie M., Jazmin, and Christy

Storyboard Text

  • This is the third day of the study of the cell cycle in science class. 
  • Today class we are going to continue our study of the cell cycle by watching a video about mitosis
  • Today in this video we're going to learn about the cell cycle.  We know that Mitosis is one of the two ways that a cell can divide.  We also know that the cell cycle only takes place in eukaryotic cells. We have also learned that interphase is one of the two main parts of the cell cycle. 
  • Interphase: The phase of the cell cycle without cell division.  During interphase the cell duplicates it's chromatids (genetic material/ DNA) and gathers nutrients.  Chromatids are located in the nucleus they are the genetic material of the cell.  Chromatids are made of molecule DNA.  During interphase the G1, S, and G2 periods occur.  During the G1 period the cell creates organelles and begins metabolism.  During the S period of the cell chromosomes are copied.  At the end of the S period each chromosome is composed of two sisters chromatids. When the G2 period occurs the cell grows in preparation for cell division. Chromatids are two chromosomes connected by the centromere in the middle.  
  • The process of mitosis is divided into four stages (prophase, metaphase, anaphase, and telophase)  Cytokinesis is the process that comes after the mitosis process.  Cytokinesis is the process when the cytoplasm and cell membrane divide. Cytokinesis results in two identical cells.  During prophase the DNA molecules are progressively shortened and condensed by coiling to form visible chromosomes.  Enzymes break down the nuclear membrane and nucleolus, spindle fibers also form during prophase.  During metaphase the spindle fibers attach themselves to the centromeres of the chromosome and align the chromosomes at the middle of the cell.  Anaphase is when the spindle fibers shorten and centromere splits separating the two sister chromatids.  Telophase is when the chromosome pairs are pulled to opposite poles of the cell.  The nuclear envelope and nucleus reform. The centrioles are what the spindle fibers attach to when pulling the chromosomes to opposite ends of the cell.
  • The End!! By: Maddie,  Christy,  Christasia, and Jazmin
  • I hope you all enjoyed and learned something from the video.  Have a good rest of the day class dismissed.
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