Gene flow, Genetic drift, Allele frequency practice

Genetic drift is a change in allele frequency in a population due to:

• random chance

• natural selection

• sexual selection

• artificial selection

Genetic drift is more dramatic in:

• aquatic populations

• terrestrial populations

• small population

• old populations

All of the genetic information found in a population

• population

• genetic drift

• evolution

• gene pool

Genetic drift is driven by chance, not natural selection

• true

• false

A forest fire ignites and kills many members of a population of rattlesnakes. This is an example of:

• gene flow

• genetic drift

• mutation

This image represents:

• gene flow

• genetic drift

Maria Concepcion Soto settled in the northern area of Venezuela. She suffered from a rare genetic disorder called Huntington’s Disease. As a result, the now 20,000 individuals who live there also have a high risk of Huntington’s Disease. This is an example of:

• genetic drift

• gene flow

Genetic diversity is increased through:

• genetic drift

• gene flow

This image is an example of:

• genetic drift

• gene flow

A virus killed most of the seals in the North Sea (e.g. dropped the population from    8000 to 800).  In an effort to help preserve the species, scientists caught 20 of the   remaining seals and used them to start a new population in the northwest Pacific   Ocean.  Which of the following statements would accurately describe the new   population?  

• The new seal population is genetically less diverse than the original population 
• The new seal population is genetically more diverse than the original population
• There is equal genetic variety compared  to the original population 
• None of the answers