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South Carolina ETV
1101 George Rogers Boulevard
Columbia, SC 29201-4761
Phone: 803-737-3545

Biology: What Happens When A Cell Divides? (Grades 10)

MASTER TEACHER

Gloria Brigman

OVERVIEW

This lesson is designed to show the students how a cell reproduces. Through the use of video, students will see the different phases of mitosis.

ITV Cell Biology Resource, Lesson 5: DNA replication and Mitosis

LEARNING OBJECTIVES

Students will be able to

• define mitosis
• List the phases of mitosis explain what happens in each phase of mitosis

SC MATH/SCIENCE STANDARDS MET

Science Achievement Standards Area 1, Strand 1

Grades 9-12 investigate how different organisms maintain homeostasis

investigate and describe the role of mitosis in the growth and maintenance of organisms

Math Achievement Standards Measurement

Estimate, construct, and use measurement for descriptions and comparison by:

• constructing an object or figure according to specific measuring requirements
• choosing appropriate techniques, units, and tools to measure quantities.

MATERIALS

Per laboratory station

• paper rectangles
• paper circles
• scissors
• glue (white, non-toxic)
• elbow macaroni
• dental floss
• thin spaghetti
• metric ruler

VOCABULARY

mitosis

interphase

prophase

chromatids

metaphase

spindle fibers

anaphase

telophase

cytokinesis

PRE-VIEWING ACTIVITIES

Paper rectangles, paper circles, scissors, glue, elbow macaroni, dental floss and spaghetti are placed at each lab station or working area earlier.

Say, "Now we will learn how a cell reproduces

Pass out the laboratory Activity Sheets.

FOCUS FOR VIEWING

To give students a specific responsibility while viewing, ask them to raise their hands the first time one of the vocabulary words are heard.

VIEWING ACTIVITIES

Advance the video DNA Replication and Mitosis to mitosis and cytokinesis. Pause the video after the definition of mitosis is given. Say,"Mitosis is cell reproduction. The sorting of chromosomes resulting into two identical nuclei. One cell becoming two cells.

Say, "The next phases of mitosis are observable. Prophase will follow. Listen and see what happens to the chromatin material in the nucleus of the cell. Resume the video.

Pause the video when the words protein spindle-fibers are shown on the screen. Say, "Following prophase comes metaphase. Let's see what happens to the chromosomes in metaphase." Resume the video.

Pause the video when the narrator says, "the cell can now divide." Say, "Telophase is the final phase of mitosis involving the chromosomes but now the entire cell needs to divide." Resume the video.

POST-VIEWING ACTIVITIES

Say, "Let's take a few minutes to discuss our vocabulary words." (10 minutes)

Say, "Now it's time to make the phases of mitosis "

ACTION PLAN

Have students investigate the relationship between mitosis and cancer. What phase of mitosis will you expect to observe more frequently.

EXTENSION

History. Investigate the beginning study of mitosis. When were the phases first observed and diagrammed.

ACTIVITY SHEETS (PDF)

• Activity Sheet 1
• Activity Sheet 2