I created these notes to introduce my biology students to dihybrid crosses and how to interpret them. These notes can be used as a lecture outline during any Punnett square unit to help students, and they can also be used to keep up with the information from the Punnett squares: Dihybrid Crosses PowerPoint that is also available. I have found that it is much easier and more efficient to teach students how to perform these crosses using two 2 x 2 squares as opposed to one large 4 x 4 square. Most of the problems that come with dihybrid crosses come in the form of clerical errors by the students as they fill in and read the larger 4 x 4 squares. This simpler approach will help your students understand how to perform these crosses with much less difficulty and a much higher success rate. I have also included a multiplication table of percentages at the end of the notes which can be used by your students if calculators are not available. Don't miss out on this great value!