The 2016 AP Biology exam opened with a fantastic free response question that asked students to incorporate multiple biological concepts. Students were asked to understand:
- Tolerance levels of mussels in different levels of salinity in the Long Island Sound.
- How different alleles of the same gene can produce different functioning enzymes.
- Regulation of water balance in different salinities.
- Adaptations of mussels in different salinities.
I loved this AP Biology exam question because it incorporates the Big Ideas of biology, ecology, genetics, homeostasis, and evolution. The question from the College Board can be found . This question is based on a research paper from Koehn, Newell, and Immermann (1980) called Maintenance of an aminopeptidase allele frequency cline by natural selection. I created a simulation to help my students work through the paper and teach the principles of the Hardy-Weinberg equilibrium. is the simulation.
HERE is how I structured my lesson.