Mechanisms of Evolution

In a population of ladybugs, black bugs are more successful in escaping predators. Overtime, this gene becomes more popular in the population and the ladybug population loses its red color.  

• Natural Selection
• Mutation
• Genetic Drift
• Gene Flow

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 A lion gets chased off from his pride, then joins another pride. He mates with a lioness and make 6 lion cubs.

• Natural Selection
• Mutation
• Genetic Drift
• Gene Flow

 A hurricane wipes out half the population of blue jays in Cape Hatteras, North Carolina.

• Natural Selection
• Mutation
• Genetic Drift
• Gene Flow

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A hawk captures a black mouse in a desert, and leaves a tan mouse behind

• Natural Selection
• Mutation
• Genetic Drift
• Gene Flow

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Ten years ago, in a small population of ducks, two sizes of eyes were observed, large and small. Three ducks have large eyes and 7 have small.  2 of the large-eyed ducks are randomly hit by cars and killed. Today, no large-eyed ducks are present in the population.

• Natural Selection
• Mutation
• Genetic Drift
• Gene Flow

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 A population of flowers on one side of a river transports pollen to the flowers on the other side of the river, producing offspring.

• Natural Selection
• Mutation
• Genetic Drift
• Gene Flow

A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population.

• Founder Effect

• Natural Selection

• Non-random mating

• Mutation

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There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off because of human activity and only a few survived.  What is this an example of?

• Bottleneck Effect
• Genetic Drift
• Founder Effect
• Natural Selection

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Which of the following is true of genetic drift?

• It can decrease genetic diversity in a population
• It is necessary in order for a population to be in equilibrium
• It can increase genetic diversity in a population 
• It plays a much larger role in determining the genetic makeup of populations than natural selection 

This mechanism of evolution occurs when populations migrate.

• Extinction
• Gene flow
• Genetic drift
• Natural Selection

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