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Populations Genetics Lab Write Up
Work within the Population Genetics Lab and refer to the detailed instructions on Assignment 1, and then answer the following questions:
Set up an experiment to help you understand the Hardy-Weinberg equilibrium and the factors that influence a state of equilibrium in a population. Leave all input parameters at their default values. Based on these conditions, does each moth genotype have an equal chance of survival, or is there a selective pressurepositive or negativeon one or more genotypes? Explain your answer.
Return to the initial page of the simulation if you are still in the Change Inputs view. Find the popup menu, showing the number of generations, in the lower left corner of the screen. Leave the generation number set at its default value of 100. Click the Run Experiment button to run this simulation. Look at the allele and genotype frequencies. Is there a change in allele frequency over time? Is there a change in genotype frequency over time? What did you observe?
Explain your answers.
How do the actual genotype frequencies compare to the Hardy-Weinberg predictions? Repeat this experiment at least three or four times to determine if the results from this experiment are consistent. Compare your results from each experiment. Were your results consistent? Explain why or why not.
Repeat this experiment with a different set of initial genotype frequencies. Before you run the experiment, use the Hardy-Weinberg equation to predict what will happen to this population. What did you discover? Did the results agree with your predictions? Explain why or why not.
Repeat the experiment described above and use chi-square analysis with one degree of freedom to test your prediction. How many generations does it take for a population to reach Hardy-Weinberg equilibrium?
Might different initial genotype frequencies lead to the same Hardy-Weinberg equilibrium? Explain why or why not.
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