Cell Cycle

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  • I don't understand how I'm so big, and my baby sister is so small!
  • In Interphase, the cell goes about it's normal functions and activities and it replicates it"s DNA strands to double the amount.
  • Well, you've grown through a process called the cell cycle. Interphase is the first step!
  • In Prophase, the DNA strands form chromosomes, and the nuclear membrane starts breaking down. The spindle fibers reach across the cell, coming form the centrioles, the red dots.
  • Next is the Prophase step.
  • What's Next?
  • The next phase is Metaphase.
  • This is so cool!
  • Metaphase is when the nuclear membrane is gone, and the chromosomes line up in the cell. The spindle fibers attach to th centers of the chromosomes.
  • In Anaphase, the chromosomes are pulled apart and to opposite sides of the cell by the spindle fibers.
  • Mom, what's next in the cycle?
  • Next is Anaphase. There are 6 steps in this cycle! In a human cell, there are 46 chromosomes, but for the model, we are using 4.
  • In Telophase, the cell membrane starts pinching in, and 2 nuclear membranes start forming around the 2 DNA groups.
  • In this next stage, Telophase, the cell starts splitting into 2 new cells! That's how you grow!
  • But how does this process benefit the organism?
  • The last stage is Cytokinesis. Through this process, the organism grows, develops, reproduces, and repairs!
  • That was really awesome! Now I know how my body grows!
  • In Cytokinesis, the cell completely splits, and there are now 2 new daughter cells.
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