A class of 12 AP biology students gathered the following data:

Initial class frequencies:
AA 3    Aa 6    aa 3

Final class frequencies:
AA 2    Aa 5    aa 5

1. What are the initial p and q?

2. What are the final p and q?

3. Is the population in Hardy-Weinberg equilibrium? Explain the reason for your response.

Note: The population selected for this example has an equal frequency of dominant and recessive alleles in the initial population, but this is NOT what is meant by Hardy-Weinberg equilibrium! If this population is at equilibrium, the next generation will also have the same allelic frequency, and the next, and the next . . .