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The Cell Cycle Rap

The Cell Cycle Rap. By Dr. Art Siebens. You began as one cell called a zygote So how’d you get to be so big Just take note. That first cell divided So then there were two. Those two became 4 Then 8 as you grew. To help you understand that process Is our mission

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The Cell Cycle Rap

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  1. The Cell Cycle Rap By Dr. Art Siebens

  2. You began as one cell called a zygote So how’d you get to be so big Just take note.

  3. That first cell divided So then there were two. Those two became 4 Then 8 as you grew.

  4. To help you understand that process Is our mission ‘Cause you’ve got to have a vision of cell division

  5. Before we get too far We need to think About the genes on chromosomes that control everything

  6. Your cells have DNA, DNA makes your genes And through transcription and translation Genes code for proteins

  7. But keeping track of those genes Is one of nature’s tricks Cells use chromosomes Humans have 46

  8. Now when a cell’s not dividing Chromosomes are unwound It’s called chromatin DNA’s spread all around

  9. But when a cell divides DNA will condense into rods called chromosomes It makes lots of sense That way you get all your genes and not any more

  10. Too many too few, you’ve got problems in store There are some birth defects you can detect right away

  11. In a karyotype An ordered chromosome display Each chromosome has two halves Exactly the same

  12. They’re sister chromatids Remember that name They’re held together at the centromere But not for long as you soon shall hear

  13. Now chromosomes come in pairs You’ve got 23 One per pair from each parent Most cells are diploid you see

  14. ‘course eggs and sperm have only one from each pair So fertilization results in chromosome “repair” 23 from mom 23 from dad

  15. A zygote’s back to 46 then it divides like mad Now in all but gametes The nucleus divides through mitosis There are 4 stages on which we need to focus

  16. In prophase ‘through a scope You can see chromosomes The nuclear membrane breaks down so they can find a new home

  17. In metaphase The chromosomes form a line It’s like they’re doing a dance and they’re looking real fine

  18. In anaphase the centromere divides And the chromatids move towards opposite sides In telophase chromatids are at opposite ends

  19. New nuclei form That’s how mitosis happens Then cytokinesis takes place The cytoplasm splits

  20. Now you’ve got 2 cells That’s just about it Except the cell’s got to grow And DNA replicate Made of G1, S, and G2

  21. It’s called interphase Though mitosis and cytokinesis are more exciting Through most of the cell cycle the cell’s not dividing

  22. So that’s the cell cycle And all of its parts Hope this little rap helps you to learn it by heart!

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