Interrelations of the Populations of the Rana pipiens Complex

摘要: Measures of similarities and differences among organisms are basic to many branches biology. Systematics is the codification such information. Lewontin (4) has stated recently that “the major unsolved problem descriptive population genetics an adequate specification genetic difference between two closely related species as compared populations same species.” A reasonable solution this cannot be expected until it becomes possible state more precisely. For example, one expect “an species...” unless there specific intraspecific categories. Then again, biologists have never agreed on what they meant by differences, relatedness, etc. Usually some measure total implied though, necessity, only a minute unknown fraction actually dealt with.