This activity is perfect for cooperative or independent learning or assessment. In this activity, students flip a coin to determine which form of a gene two parent creatures will have for several traits. Then they must determine the genotype and phenotype for each trait for each parent, and draw what each parent looks like. Next, students must flip a coin to determine which allele each of three offspring inherit from each parent for each trait. Then they must determine the genotype and phenotype for each trait for each offspring. This file includes a brief teacher's guide.