Evolutionary Mechanisms

 In which scenario is Genetic Drift most likely to have a significant impact? 

• in large, mixed populations

• during mass migration events

• in isolated, small populations

• in populations with high mutation rates

A _____________________ involves a change in the genetic code of an organism.  Because this change occurs in the genetic code, it is passed on to future generations.

• Morphology
• Mutation
• Gene Flow
• Genetic Drift

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Which of the following terms represents the movement of individuals into or out of an area?

• natural selection

• mutation

• gene flow

• adaptation

Which of the following is an example of genetic drift?

• A herd of cattle being selectively bred for increased milk production

• A population of plants adapting to a new climate through natural selection

• A small population of birds being isolated on an island and developing different traits over time.

• A group of fish developing different colors due to environmental factors

What occurs when members of one population migrate and interbreed with another population.

• Mutation

• Gene Flow

• Adaptation

• Gene Pool

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

What is the effect of genetic drift on a small population?

• It increases genetic diversity

• It has no effect on the genetic makeup

• It can lead to a loss of genetic variation

• It promotes gene flow

Which term describes the total variety of genes within a specific population?

• Genetic mutation

• Gene pool

• Natural selection

• Ecosystem diversity

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

What is the term for the process where gene frequencies in a population change as a result of random events or chance?

• Genetic mutation

• Natural selection

• Genetic drift

• Gene flow

A young rancher recently inherited a herd of cows,but there was no bull for breeding.  He found a rancher online that was selling several bulls from his ranch.  The inexperienced rancher randomly selected a bull to purchase and brought it to his ranch. He put the bull out to pasture with his cows.

• Gene Flow

• Genetic Drift

• Natural Selection

• Recombination

Tags

NGSS.HS-LS4-2

 A population of Canadian geese traveling south flew through a storm.  Two of the geese were blown off course and had to land for the night.  The next day they heard another population of Canadian geese flying overhead and joined them in their migration.

• Gene Flow

• Genetic Drift

• Natural Selection

• Recombination