Here's an awesome introduction to the genetics of Gregor Mendel including simple dominance, co-dominance, and incomplete dominance. The reading includes a sequential vocabulary list which includes genotype and phenotype. The guided notes allow students to reinforce vocabulary, practice Punnett Squares, and obtain genotypic and phenotypic ratios. The reading is easy to understand for all level biology students. Students love having the concise guided notes to use as a study guide. The unit is divided into parts 1 and 2. Part 1 introduces dominant and recessive alleles. Part 2 introduces co-dominance and incomplete dominance.