Genetic drift

 

  

Evolution is driven by the following mechanisms.
- Genetic drift,
- Natural selection,
- Mutation,
- Migration .

Genetic drift is the process by which the frequency of certain genes in a population change due to random occurrences or simply by chance. Unlike natural selection which has an end goal, which is to increase the gene frequency of the traits that are beneficial in allowing the individual to survive and reproduce in a given environment, genetic drift acts on pure chance.

Genetic drift happens in all populations by chance and there is no avoiding it.

Similar to natural selection genetic drift is a mechanism of evolution but unlike natural selection it does not produce adaptations.
Explain the difference between genetic drift and natural selection  
What are the similarities between genetic drift and natural selection.  
Give an example of genetic drift apart from the one mentioned here with the beetles.  
Answer true of false  
1) Genetic drift does not involve variation in the population  
2) Genetic drift results in adaptations that enable organisms to be better suited to their environment.  
3) Both natural selection and genetic drift result in the change of gene frequency amongst a population  
4) Genetic drift involves competition between members of a species.  
5) Genetic drift is common in nature whereas natural selection is not.  
Solutions