If you are like me, you are covering Genetics around Valentine's Day. This activity is perfect for reinforcing genetic principles such as Genotype, Phenotype, Complete Dominance, Incomplete Dominance, Codominance, and much, much more. Students pair female chromosomes from an "egg" and male chromosomes from a "sperm" to determine the genotype of 11 different traits for their valentine. They use these genotypes to determine the phenotypes of their particular valentine. From here, students use