These notes are designed to be used with the Punnett Squares: Codimanance and Incomplete Dominance PowerPoint that is also available. The PowerPoint includes introductory slides intended to review your students on the basic concepts surrounding Punnett squares. It then quickly transitions into a full lesson on the most common types of non-Mendelian inheritance patterns: codominance and incomplete dominance. These ideas are explained thoroughly using the most common examples of each, blood typing and flower pigmentation. Student note pages and extra worksheets for practice are each available!