Ninth graders complete a monohybrid cross and a dihybrid cross. In this biology lesson plan, 9th graders predict the traits of offspring using the Punnett square. They differentiate recessive and dominant genes.

Students analyze genetic characteristics in a given family tree through the F2 generation. Students apply prior knowledge from Gregor Mendel's study with pea plants and his Laws of Heredity to answer questions.

Students apply their knowledge of "I Values " and have mastered the use of the "Decision Making Model," they are ready to study case studies. They use case studies use to figure out punnet squares, and family traits.