12 years and up. (7th grade minimum)
Students work through the steps of meiosis in “LEGO fish” cells to understand the process of gamete cell division and the ways that genes can be expressed. After modeling meiosis with LEGO bricks, students predict the phenotype and genotype of possible offspring for two parents with a known genotype. They discuss how a single phenotype could be the result of several different genotypes, and see how the environment interacts with and affects the gene pool of a given population.