The Hardy-Weinberg Principle is a mathematical law that predicts allelic frequencies, making several assumptions:

- Large population
- Random mating
- No immigration
- No emigration
- No natural selection

In nature, these assumptions are extremely unlikely to occur, but it is the deviation from the expected distribution of alleles (according to the HW Principle) that informs us about the action of these natural conditions.

- Introduction to the Hardy-Weinberg Principle (YouTube, 4.39 min)
- The Hardy-Weinberg Principle – watch your p’s and q’s! (YouTube, 12.15 min)

Please complete Activity 13.2 (page 141) Looking at Allele Frequencies – Parts A and B.