Vocabulary - Mechanisms of Evolution

How often a variation of a trait is observed within a given population.

A measure of evolutionary change over time at the molecular level (DNA or RNA)

All the alleles in every organism's genome within a population in a given area. 

A reproductive ability to pass on their genetic information on to the next generation.

Process of a population (not an individual organism) adjusting to fit the changing environment or situation. 

Cumulative process of a many adaptations adding up over long period of time until the genome biological population changes to the point at which a new species is formed.  

Survival of the best adapted individuals within a population.

The movement of the alleles from one population to another. 

Selecting a mate based on various conditions or situations. 

Random changes to the frequency of alleles in a small population due to chance.