Answer Sheet - Laboratory 2
Exercise 1 - Hardy-Weinberg Equilibrium
1. In general, what do the beads used in this experiment represent?
2.
Fill in the spaces below
A = ________________ color ___________ Allelic frequency a = ________________ color ___________ Allelic frequency
3.
How many diploid individuals are represented in this population?
4.
What would be the color of the two beads for a homozygous dominant individual?
5.
What would be the color of the two beads for a homozygous recessive individual?
6.
What would be the color of the two beads for a heterozygous individual?
7.
State the Hardy-Weinberg theorem. This will be your hypothesis.
8.
State in your own words what you think the Hardy-Weinberg theorem means.
9.
Use the space below to fill in the information you get from your experiment.
Generation 1
# of AA individuals_____ # of Aa individuals ____ # of aa individuals ______ p = _______ q = _________

Generation 2
# of AA individuals_____ # of Aa individuals ____ # of aa individuals ______ p = _______ q = _________
Generation 3
# of AA individuals_____ # of Aa individuals ____ # of aa individuals ______ p = _______ q = _________
Generation 4
# of AA individuals_____ # of Aa individuals ____ # of aa individuals ______ p = _______ q = _________
Generation 5
# of AA individuals_____ # of Aa individuals ____ # of aa individuals ______ p = _______ q = _________
Draw a line figure showing the pattern of p and q in this experiment.
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1 2 3
Generation
4 5
10.
What conclusions can you draw from this experiment? Did you find support for your hypothesis?

Exercise 2 - Natural Selection
1.
What is your hypothesis for model 1? What do you think will happen?
2.
What happened to p and q during the first simulation? Did the results agree with or refute the Hardy-Weinberg theorem? Why?
3.
What is your hypothesis for model 2?
4.
What happened to p and q during this simulation? Did the results agree with the Hardy-
Weinberg theorem? Why or why not?
5.
What is your hypothesis for model 3?
6.
What happened to p and q during this simulation? Did the results agree with the Hardy-
Weinberg theorem? Why or why not?

7.
Look at the trend over the course of all three simulations? What conclusions can you make?
Attach a copy of your Excel figure to the answer sheet.
8.
Did external forces affect the genetic makeup of the pepper moth population? If so, what were they?
9.
What is the benefit of using the Hardy-Weinberg equilibrium to test evolution?