7.4 Hardy-Weinberg Equilibrium
in AP Biology
When certain conditions are met, allele and genotype frequencies do not change, a state called the Hardy-Weinberg equilibrium. “Hardy-Weinberg equilibrium”: Refers to an idealized, non-evolving population.
To Think About:
What is the Hardy-Weinberg model? What are the conditions under which allele and genotype frequencies will change in populations? How are allele and genotype frequencies calculated using the Hardy-Weinberg Equations? What do changes in allele frequency provide evidence for? What are the impacts on the population if any of the conditions of Hardy-Weinberg are not met?
Watch: AP Daily Video Hardy-Weinberg Equilibrium
Answer the Following Questions:
- What is the Hardy-Weinberg model used to describe?
- List the five conditions necessary for Hardy-Weinberg equilibrium
- p2 + 2pq + q2 is used to determine __________________________________
- p + q = 1 is used to determine ____________________________
- Changes in allele frequencies provide evidence for ______________________
- Describe five factors that can disrupt the Hardy-Weinberg equilibrium
- If p = 0.2, and q = 0.8, give the frequencies of the following: a. Homozygous dominant genotype b. Heterozygous genotype c. Homozygous recessive genotype d. Dominant phenotype (8) STOP pause the video at 6:56 and write the correct answer to the question here
Supplementary Resources:
- Bozeman Science: Mr. Andersen’s Solving Hardy-Weinberg Problems video
- Scitable (Nature Education): The Hardy-Weinberg Principle
