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Understanding the Cell Cycle: Interphase, Mitosis, and Cancer Development

The cell cycle consists of interphase and mitotic phases, essential for cell division. Interphase is the longest phase, including G1 (cell growth), S (DNA replication), and G2 (preparation for division). Mitosis follows, resulting in two identical diploid cells. Cancer develops when cells ignore checkpoints that regulate division. Key events such as crossing over during meiosis and potential genetic disorders like Down Syndrome and Turner Syndrome showcase the complexity of cellular processes. Understanding these stages is crucial to grasp cancer mechanisms and genetic diversity.

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Understanding the Cell Cycle: Interphase, Mitosis, and Cancer Development

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  1. The phase of the cell cycle that occupies most of a cells life interphase

  2. What occurs after cytokinesis is completed? • G1

  3. What is correct sequence of cell cycle • G1, s, g2, mitosis, cytokinesis

  4. Cells that are not dividing remain in the • g1

  5. What occurs in s phase • Dna replication

  6. The first 3 phases of the cell cycle are known as • interphase

  7. Mitosis is the process by which • Nucleus divides

  8. Mitosis forms cells that are • Diploid • identical

  9. Normal cells become cancer cells when • Cells do not respond to checkpoints

  10. How many chromosomes are in the body cells of an organism that has a haploid number of 10 • 20

  11. Somatic cells are • Body cells • diploid

  12. Gametes are • Sex cells • haploid

  13. Crossing over occurs during • Meiosis • Prophase 1

  14. What provides new genetic combinations? • Random fertilization • Random alignment • Crossing over

  15. DNA is in the form of _____ when the cell is not dividing • chromatin

  16. Harmful cancer • malignant

  17. Checkpoints are checking for: • Is cell big enough • Are spindle fibers attached to chromosomes correctly • Is DNA copied correctly

  18. Harmless cancers • benign

  19. During what phase does the cell prepare for division • G2

  20. The failure of the chromosomes to separate during division is called: • Nondisjunction

  21. Signs of Cancer? • Caution • ABCD

  22. What phase of mitosis do chromosomes become visible • prophase

  23. What is the correct sequence of events in Mitosis • PMAT

  24. How many pairs of chromosomes are present in body cells? • 23

  25. Differentiate between mitosis and meiosis • Crossing over • Two divisions • Haploid • 4 cells • Produces gametes (sperm/egg)

  26. Growth of new blood vessels to support tumors is called _________. • angiogenesis

  27. What is trisomy 21? • Down Syndrome

  28. What is monosomy X? • Turners Syndrome

  29. What is XXY • Klinefelter syndrome

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