Genetic Drift and Gene Flow

Reindeer from a rancher in Alaska escape from their pen during an enormous snow storm. After their escape, they mate with wild caribou that are migrating across the land. The offspring of these have traits for short legs and have tame behavior.

• Gene Flow

• Genetic Drift

• Non-Random Mating

• Natural Selection

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

During a hurricane, a population of beetles almost gets completely wiped out. The only beetles that survived were lucky that they were in their nest at the time of the hurricane and had enough food to survive.

• Natural selection

• Genetic Drift

• Gene Flow

• Non-Random Mating

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

The country of Sweden is known for having people with blonde hair and blue eyes. One day a family moves from Sweden to India where dark hair and dark eyes are very common. A female from Sweden marries a male from India and their offspring now have blonde hair and blue eyed traits.

• Natural Selection

• Mutation

• Non-Random Mating

• Gene Flow

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A certain type of plant can produce blue or yellow flowers. During a fire, many yellow flowers are destroyed and now since blue is the dominant trait, the plant reproduces offspring that produce only blue flowers.

• Non-Random Mating

• Gene Flow

• Mutation

• Genetic Drift

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

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

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

Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington's Disease, because the Dutch colonists happened to carry that gene with unusually high frequency.

• Gene flow

• Natural Selection

• Bottleneck Effect

• Founder Effect.

• gene flow

• natural selection

• bottleneck effect

• founder effect

Tags

NGSS.HS-LS4-4

• Gene flow

• natural selection

• bottleneck effect

• founder effect

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-4

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

• gene flow

• natural selection

• bottleneck effect

• founder effect