A group of students wonders how a single cat can have kittens with different coat colors. In this problem, the challenge for students is to explain the difference between cats with pale versus dark coats in terms of DNA, proteins, and traits and explain the inheritance of pale coats. Cats are a species common in students’ homes, and they exhibit a wide variety of coat colors. These coat colors are examples of common patterns of inheritance, so cats make a good model for learning how to predict the appearance of offspring and explain observed results. A materials list, teacher background information, safety practices, references, assessment, and outcomes are provided. This book selection includes the Table of Contents, Preface, Catalog of Problems, Acknowledgments, About the Authors, References, and Index.