What term describes a group of interbreeding individuals that share a common gene pool?

The term that describes a group of interbreeding individuals that share a common gene pool is known as a Mendelian Population. This term is significant in the field of genetics and evolutionary biology, as it allows scientists to study the genetic makeup and variations within a specific population. A Mendelian Population can be characterized by its ability to interbreed and pass on genetic traits, thereby contributing to the population's overall gene pool.

In this context, the concept of a Mendelian Population is crucial because it establishes a foundation for understanding how genetic traits are inherited and how populations evolve over time. This concept helps in exploring aspects like genetic drift, selection pressures, and the introduction of new genetic material through migration.

The other terms are related but do not accurately define a group of interbreeding individuals sharing a common gene pool. A gene pool refers to all the genetic information within a population, population density pertains to how many individuals live in a given area, and a species group does not specifically address the interbreeding aspect. This definition distinguishes the Mendelian Population as a critical concept in the study of genetics and evolutionary processes.