“She Has Her Mother’s Laugh” is a book by Carl Zimmer that explores the science of heredity and genetics. It delves into how traits are passed down through generations, examining both physical characteristics and behavioral traits. The book combines personal stories with scientific research to illustrate the complexities of inheritance. The title refers to the idea that certain qualities, like a laugh, can be inherited from parents to children. Zimmer discusses various examples, including DNA, genetic mutations, and the role of environment in shaping who we are. The book aims to make the science of genetics accessible to a general audience.