Name: ____________________________________Date:______________________________Period:______Score:_____
Activity 63: Show Me the Genes
Getting Started:
1. Where is genetic information located in your cells? __________________________________________________
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Directions: Read “Show Me the Genes” on pages D-47 to D-54 with your group and STOP TO THINK when directed.
STOPPING TO THINK 1:
How is the function of cell division in single-celled organisms different from cell division in multicellular organisms?
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STOPPING TO THINK 2:
What would happen to the number of chromosomes in each cell if copies of them were not made before cell division?
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USE FIGURE 6 TO COMPLETE THIS DIAGRAM WITH THE AMOUNT OF CHROMOSOMES IN THE NUCLEII:
Egg
Normal
Body Cell
Sperm
Fertilized
egg cell
What kind of cells are created through a “special kind of cell division”? _______________________________________
STOPPING TO THINK 3:
Why must the number of chromosomes in the sperm and egg be half the number of chromosomes in the other cells of
an organism? _______________________________________________________________________________________
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Name: ____________________________________Date:______________________________Period:______Score:_____
STOPPING TO THINK 4:
Consider two children with the same two parents. Would you expect them to have the same sets of chromosomes?
Explain why or why not. ______________________________________________________________________________
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STOPPING TO THINK 5:
How exactly does a mutation change the form of an organism? When do such mutations occur? ___________________
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Class Discussion:
Using the diagram your teacher shows you, complete the mitosis diagram below with description and chromosomes:
Step 1
Step 2
Step 6
Step 3
Step 4
Step 5
Name: ____________________________________Date:______________________________Period:______Score:_____
Using the diagram your teacher shows you, complete the meiosis diagram below with description and chromosomes:
Step 5
Step 1
Step 2
Step 3
Step 4
Step 6
Step 8
Step 7