GENETIC DRIFT

What is genetic drift?

• the changes in allele frequencies (genes) ,in a population, happening due to random events/circumstances.

• It is an example of primary succession

• Genetic drift are different organisms in a population due to inherited traits from their parents

• It is part of symbiotic relationships such as mutualism, commensalism, parasitism

Genetic drift is change in the allele frequency of a population due to...

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

 Genetic Drift is more likely to happen in... 

• aquatic populations
• small populations
• terrestrial populations
• older populations

All of the genetic information found in a population.

• population

• genetic drift

• evolution

• gene pool

Which of the following is true?

• Gene pool frequencies do not change as a result of migration in or out of a population.

• Gene flow occurs only as a result of isolation of a small population.

• Gene flow can cause new alleles to enter a population's gene pool.

• Gene flow is due to the selection of the most favorable traits.

A change in a gene, group of genes or chromosome that results in a change in the proteins

• Replication

• Mutations

• Translation

• Transcription

Mutations can benefit humans because they can:

• Cause illness

• Make an organism more suited to live in its environment.

• Make organisms live shorter lives

• Cause organisms to grow extra limbs.

A mutation is defined as:

• A change in the cell's structure

• Anything that changes in an embryo

• Any change in the physical features of a human

• A change in the DNA sequence

Mutations are SOMETIMES helpful to the organism.

• true

• false

The combined genetic information of all memebers of a particular population forms a:

• gene pool

• allele frequency

• phenotype

• population