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Cellular reproduction & cancer

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Presentation on theme: "Cellular reproduction & cancer"— Presentation transcript:

1 Cellular reproduction & cancer
Chapters 17 & 18

2 Mitosis a type of cell division for asexual reproduction

3 DNA replication-the big picture

4 After DNA replication. . . sister chromatids cytokinesis

5

6 Cytokinesis in animal cells

7 Sexual reproduction

8 Meiosis

9 Meiosis big picture: two cell divisions

10 During meiosis I

11 Crossing over

12 After crossing over. . .

13 Influences on cell division
Chemical factors Physical factors

14 Chemical factors Growth factors;

15 Physical factors Density-dependent inhibition Anchorage dependence

16 Death is part of a cell life cycle

17 What happens when the cell cycle malfunctions?

18 Cancer cells are rounder / larger
Cancerous leukemia cells (L) & normal marrow cells (R)

19 Cancer cells produce their own signals to divide

20 Cancer cells do not display density-dependent inhibition

21 Cancer cells do not display anchorage dependence

22 Cancer cells can stimulate the development of blood vessels

23 Cancer cells are essentially immortal
HeLa cells, 1951


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