Biology 100/101
Lecture 9: Cell Reproduction
(Print Version)

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Assignments

Lecture Objectives

Web Resources

DNA

Chromosomes

Cell Cycle

Control of
the Cell Cycle

Stem Cells

Cancer Cells

Lecture Syllabus

IB 100/101 Home Page

Announcements

Text Readings in Lewis, et. al.

Chapter 9, The Cell Cycle
Chapter 12, DNA Structure and Replication, pgs. 231-238 and fig. 12.1

The "Reviewing Concepts" boxes are valuable summaries of the main ideas in these sections of the text.

You have open access (no log-in or password needed) to instructional materials on the Text web site. Select the text chapter you want and use the links to the e-learning modules or other available materials. There is also a collection of study materials called the "Essential Study Partner" that you may find useful.

Web Crossing

You may also ask questions and see answers to your classmates' questions in Web Crossing in the "Talk to Carl and Ed" discussion.

Objectives:

The content of this lecture will help you complete this assignment:

After studying this material you should be able to:

  1. Draw a diagram, create a concept map, or write a paragraph that explains the relationships among these terms;

    2. chromosomes sister chromatids centromeres
    telomeres DNA nucleotides
    bases (A, C, G, T) complementary base pairing sugar (deoxyribose)
    phosphate group semi-conservative
    DNA replication     		cell cycle

  2. Use common objects such as pencils or paper clips to model the replication and movement of chromosomes in a cell through all stages of the cell cycle.

  3. Using your body as a model organism, describe where we would find cells undergoing mitosis and where we would find cells that are not likely to be dividing.

  4. Describe the mechanisms by which cell division is controlled in your body.

  5. Define the term, apoptosis, and describe the role of this process in normal human development.

  6. Describe the special characteristics and functions of stem cells.

Web resources for cell reproduction:

What is DNA, Why do we need it, and Where does it come from?

How does DNA replicate?

Lewis, et. al., pg 237, figure 13.13

What are Chromosomes?

  • What are chromosomes made of? (See Lewis, et. al. pg 235, figure 13.11

  • Human Chromosomes Lewis, et. al. Page 168, figure 10.5
    • You get one chromosome of each type (1-22, plus X and Y) from your mother in her egg and one from your father in his sperm.
  • Single or Replicated Chromosomes? Lewis, et. al. Page 149, figure 9.4

  • Chromosome structure Lewis, et. al. Page 208, figure 12.1
    • Chromatids (sister chromatids)
      • Sister chromatids are produced by semiconservative DNA replication

      • Sister chromatids are exact copies of the original DNA molecule
    • Centromeres

    • Telomeres

The Life of a Cell:
Cell Division, Cell Maturation, and Cell Death (Apoptosis)

Control of Cell Division

Cell Death - Apoptosis

Stem Cells

Text, Pg. 156, fig. 9.14

  • Cell Populations

    • Renewal Cell Populations (digestive tract)

    • Expanding Cell Populations (Repair, young organisms, some adult kidney, liver, pancreas, and bone marrow)

    • Static Cell Populations (Nerve & Muscle cells - stuck in G1)

What are Stem Cells? from Sumanasinc.com

The Stem Cell Institute

Cancer Treatments Concentrate on Control of Cell Cycle

  • See OncoLink, Cancer Causes, Screening, and Prevention from the University of Pennsylvania.

  • Informtion about cancer and cancer treatments from the U.S. Food and Drug Administration - Center for Drug Evaluation and Research
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