Cline

Definition

A cline is a gradual change in a trait or characteristic of a species over a geographic area. This variation occurs due to differences in environmental conditions across the region.

5 Must Know Facts For Your Next Test

1. Clines result from natural selection acting on populations in different environments.
2. They often illustrate adaptive changes, such as variations in temperature tolerance or body size.
3. Gene flow and genetic drift can influence the formation and maintenance of clines.
4. Clines can be observed at both phenotypic (observable traits) and genotypic (genetic composition) levels.
5. The concept of a cline is essential for understanding how populations adapt to their environments over time.

Review Questions

Related terms

Gene Flow: The transfer of genetic material between separate populations.

Genetic Drift: Random changes in allele frequencies within a population.

Natural Selection: The process where organisms with favorable traits are more likely to reproduce.