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Introduction to Cell Division in Organisms

Understand the process of cell reproduction, roles of cell division, the cell cycle, and checkpoints in interphase and mitotic phases. Learn about different types of cells and the implications of cell division in cancerous tumors.

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Introduction to Cell Division in Organisms

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  1. INTRO TO CELL DIVISION

  2. Organisms can reproduce… - simple cell division • _____________________ - cell duplicates genetic material - 2 new genetically identical cells • ______________________ - two parents - genetic material from each parent combine - genetically different offspring

  3. Roles of cell reproduction • Replacement of _____ or ______ cells • _____________ • Production of ______________

  4. THE CELL CYCLE * Events from “birth” of eukaryotic cell to when it reproduces * How ________ a cell divides depends on the type of cell it is. _____________: muscle cells, nerve cells (neurons), and liver cells ______________: cells that line stomach and mouth, skin cells

  5. Before cell division…INTERPHASE • Cell carries out __________________and performs functions • Up to ___________of cell the cell cycle is spent in interphase

  6. - cell grows and carries out cellular functions ______________ phase - protein synthesis - cell  s the # of organelles ______________ phase - DNA duplicates ______________ phase - continued growth and metabolism - protein synthesis

  7. CHECKPOINT #1 (after G1) 2) Need for new cells? 3) DNA undamaged? 1) Enough growth?

  8. CHECKPOINT #2 (after G2) 1) DNA replicated? 2) Enough growth?

  9. M (mitotic) PHASE • Cell actively _______________ • ________________ and ________________

  10. Terms • Chromatin – • Chromosomes – • Diploid cells – • Haploid cells – • Homologous Chromosomes – • Genes –

  11. PROPHASE

  12. METAPHASE

  13. ANAPHASE

  14. TELOPHASE

  15. Cells in a cancerous tumor ____________at an abnormally fast rate and become irregular in appearance. • When individual cells ___________(travel from the original tumor), the cancer can spread.

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