Gene Flow and Genetic Drift

A forest fire ignites in the Sam Houston State Forest and kills many members of a population of pigmy rattlesnakes.

• Gene Flow

• Genetic Drift

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-5

 Genetic Drift is more likely to happen in... 

• aquatic populations

• small populations

• terrestrial populations

• older populations

Genetic Diversity is increased through this process.

• Gene Flow

• Genetic Drift

Match the following

• Population gets smaller (Natural Disaster)

• Mutation

• Change in DNA sequence

• Genetic Drift

• Starting a new population

• Founders Effect

• Increases genetic variation

• Gene Flow

• Usually decreases genetic variation

• Bottle Neck

Tags

NGSS.HS-LS4-5

This is one of the mechanisms of evolution; it occurs when individuals move into or out of a population, either by physically arriving or leaving, or by being born or dying

• Gene flow / genetic drift

• Founder effect

• Natural selection

• Microevolution

A bee carrying pollen from one flower population to another flower population.

• gene flow

• natural selection

• bottleneck effect

• founder effect

Tags

NGSS.HS-LS2-6

Which of the following statements about gene flow is TRUE?

• Gene flow is a result of individuals that breed in an old location

• Gene flow is a result of migrating individuals that breed in a new location

• Gene flow is not a result of migrating individuals that breed in a new location

• None of the statements are true

Which of the following best describes genetic drift?

• A random change in allele frequencies in a population

• The movement of alleles between populations

• The introduction of new alleles through mutation

• The selection of advantageous traits

Tags

NGSS.HS-LS4-2

Gene flow can be described as:

• The transfer of genetic material between populations

• The random loss of alleles in a small population

• The mutation of genes within a population

• The selection of traits that increase survival

In a small isolated population, which evolutionary mechanism is most likely to reduce genetic variation?

• Gene flow

• Genetic drift

• Natural selection

• Mutation