1.7 Model genetic organisms are species with features that make them useful for genetic analysis. Organisms (a) through (e) are discussed in more detail on the pages referred to below each.

[Part a: SPL/Science Source. Part b: Pasieka/Science Source. Part c: Sinclair Stammers/Science Source. Part d: Peggy Greb/ARS/USDA. Part e: AP Photo/Joel Page. Part f: Biophoto Associates/Science Source.]