Extended Phenotype

Definition: The extended phenotype is a concept in evolutionary biology proposed by Richard Dawkins. It extends the idea of a phenotype beyond the physical body of an organism to include the effects a gene has on the organism’s environment or other organisms.

Key Points:

• Beyond the Organism: The phenotype of a gene is not limited to the physical form of the organism but also includes structures and changes in the environment directly influenced by the organism’s genetic makeup.
• Examples: Animal artifacts like beaver dams, spider webs, and bird nests. These are seen as expressions of the genes of the animals that create them.
• Evolutionary Significance: This concept suggests that the success of a gene is not just determined by the survival and reproduction of the organism it resides in, but also by its impact on the environment or other organisms.
• Challenging Traditional Views: It challenges the idea that the organism is the primary vehicle of natural selection, proposing that genes can have broader evolutionary effects.
• Implications: This idea broadens our understanding of natural selection and evolution, showing how genes can have far-reaching impacts beyond the traditional scope of biological structures.