In this investigation, students will gather their own evidence to explain how inheritance works. As they observe three generations of Wisconsin Fast Plants, students will unravel a mystery of paternity: What is the father’s phenotype? Is it the same as the mother’s phenotype or the offspring’s phenotype? Or is it something entirely different? As the generations of plants grow, students will make observations that will serve as evidence to support or refute their explanations about the inheritance of a trait.