mechanisms of evolution

  Individuals choose a mate based on their appearance or location

• Genetic drift

• Mutations

• Random mating

• Non-random mating

Tags

NGSS.HS-LS4-4

After volcanic eruption, black mice become more common on the slopes of Mount St. Helen because they camouflaged against the dark rock

• Mutation

• Natural selection

• Genetic drift

• Gene flow

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

Reduces genetic diversity by reducing population

• Gene flow

• Genetic Drift

• Natural selection

• Mutation

Tags

NGSS.HS-LS4-5

New individuals immigrate into a population

• Genetic drift

• natural selection

• gene flow

• mutations

Tags

NGSS.HS-LS2-6

Suppose a family of black wolves migrates across a land bridge to a region supporting a large population of gray wolves. A few generations later, the population consists entirely of wolves with black and gray markings. Which of the following best describes the mechanism that caused this change in the population of the wolves in the region

• The wolves with gray coats had to compete for resources with the successful black wolves, so they adapted their coats to mimic the black wolves

• The gray wolves selected other gray wolves over black wolves as mates, causing a limit to the gray wolf gene pool that resulted in genetic drift

• The flow of black wolf genes across the land bridge added to the gray wolf population's gene pool, increasing the frequency of the genes for black fur in the population

• Genetic mutations naturally occurred in the black and gray wolf populations, resulting in both groups simultaneously developing black and gray coat markings

Tags

NGSS.HS-LS4-2

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NGSS.HS-LS4-5

If the frequency of a particular allele that is present in a small, isolated population of alpine plants changes due to a landslide that leaves an even smaller remnant of surviving plants, then what has occurred?

• Gene flow

• Genetic drift

• Natural Selection

• Mutation

New gene is added through a change in DNA

• Natural selection

• Genetic drift

• Gene flow

• Mutations

Tags

NGSS.HS-LS3-2