Bio P.2 --- - --------------------------------- - --- mikelr
The Four Postulates
These are a combination of two sources, put together to make each postulate easier to understand and to fully cover it's meaning.
1. There is variation in individuals within a species or population that are due to genetics, and some are heritable.
2. Individuals in a population differ physically from one another, in many ways since variation ensures that individuals that are better suited to their environment will survive.
3. Individuals with the most favorable traits survive and reproduce more than do individuals with less favorable traits. These traits are passed on the next generation.
4. Individuals produce more offspring than the local resources can support.
Explanation of Postulate #1
Visual for Postulate #2
Postulate #3 Example
Example of Postulate #4
Freeman, S., & Herron, J. C. (2007). Evolutionary analysis (No. 575.8 FRE). Upper Saddle River, NJ: Pearson Prentice Hall.
Gayon, J. (2003). 10 From Darwin to today in evolutionary biology. The Cambridge Companion to Darwin, 240.
Huxley, J. S. (1938). Darwin's theory of sexual selection and the data subsumed by it, in the light of recent research. The American Naturalist,72(742), 416-433.
Kirkpatrick, M., Price, T., & Arnold, S. J. (1990). The Darwin-Fisher theory of sexual selection in monogamous birds. Evolution, 180-193.
Mayr, E. (1991). One long argument: Charles Darwin and the genesis of modern evolutionary thought (Vol. 2). Harvard University Press.