Genetic Drift & Gene Flow

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

Happens only in small populations, and is the change in the frequency of a gene variant (allele) in a population due to random sampling of organisms.

• Extinction
• Genetic Drift
• Bottleneck Effect
• Founder Effect

This mechanism of evolution occurs when populations migrate.

• Extinction
• Gene flow
• Genetic drift
• Natural Selection

The model below shows a how populations of organisms can change. Which of the   following concepts is best illustrated by this demonstration?                                          

•  Evolution of a predatory species
• Genetic drift 
•  Environmentally induced genetic mutations 
• Gene flow 

Tags

NGSS.MS-LS4-4

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

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

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 the the selection of the most favorable traits.

Which of the following cannot introduce new alleles into a population's gene pool?

• Mutataion
• Natural selection
• Gene Flow
• All of the above introduce new alleles into the population

Tags

NGSS.HS-LS4-2

Five hundred years after the deer had established a flourishing population in the park, a few of them venture back to their original woods and have babies with the deer there.

• Genetic Drift
• Mutations
• Non-random mating
• Gene flow

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

the available genetic differences in a population

• gene flow

• genetic drift

• gene pool

• speciation

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4