Experiments on Genetic Variation, Genetic Drift, Stochastic Events, Natural Selection, and Sickle Ce

Instructions:

1. Create and insert the data tables and graphs, as requested. Plan your data tables and graphs before you begin your experiments to make sure you gather all of the necessary data.
2. Answer the questions in complete sentences using correct grammar, spelling, and terminology.
3. Use credible sources (include a citation) to support your answers, if needed.

Experiment 1: Genetic Variation

1. Create a data table to display your results from both part 1 and part 2 of the experiment. Your table should include gene pool (bead color) and gene frequency (%) for both beaker #1 and beaker #2.

INSERT TABLE HERE

2. What can you say about the genetic variation between the two initial populations (part 1, beaker #1 compared with beaker #2)?
3. What can you say about the genetic variation between the two new populations (part 2, beaker #1 compared with beaker #2) after mixing?

Experiment 2: Genetic Drift

1. Create a data table to display your results from experiment 2. Your table should include gene pool (bead color) and gene frequency (%) for all 5 attempts from both beaker #1 and beaker #2.

INSERT TABLE HERE

2. What observations can you make regarding the gene pool and gene frequency of the surviving individuals? How does this change with multiple trials? 
3. How will the removal of individuals from the different populations affect the genotypes of future generations? How is this different from the genotypes that would have resulted if those individuals had not been removed?

Experiment 3: Stochastic Events

1. What observations can you make regarding the gene pool and gene frequency of the founding individuals? 
2. How will future generations from Beaker 3 differ from those of their parent populations?

Experiment 4: Natural SelectionCreate a graph to display your results from experiment 4. Your graph should illustrate phenotype frequency versus time (eight total attempts). Include which habitat sheet (red or blue) was used for each attempt.

2. How did the distribution of phenotypes change over time in the two different environments? 
3. For the two different environments, is there a selective advantage or disadvantage for the red and/or blue phenotypes? 

Experiment 5: Sickle Cell Anemia Inheritance Patterns

1. Record the frequency of each genotype observed during your 8 trials (10 samples each trial).

2. What is the observed gene frequency based on your first trial? How does it compare with the expected gene frequency (the starting number of beads in the beaker)? 
3. What is the observed gene frequency based on your last trial? How does it compare with the expected gene frequency (the ending number of beads in the beaker)
4. Given enough generations, would you expect one of these alleles to completely disappear from the population?  Why or why not? The genetic mutation that causes sickle cell anemia is also one that prevents malaria. Would the observed genotypes in geographic areas where malaria is common be different from other geographic areas where malaria is not common? Why or why not?