Mechanisms of Evolution Interventions

Match the following

• Gene Flow

• Occurs due to physical difference as a result of a genetic difference

• Genetic Drift

• the movement of genes into or out of a population

• Migration

• The movement of organisms from one place to another

• Non-Random Mating

• Random chance; small population

• Mutation

• A sudden change in one or more characteristics due to a change in a gene

Imagine a gene mutation creates a new color of hair. According to Andersen, what will this do?

• cause everyone to look the same

• change the freqency in the gene pool

• cause most hair colors to disappear

• create a new species because of the disruption in the food web

• nothing will happen

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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

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Males of the bighorn sheep species fight one another to show females who is the dominant male and are more likely to mate with females.

• Natural Selection

• Mutation

• Genetic Drift

• Non-Random Mating

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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

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Insects become resistant to pesticides very quickly, sometime in one generation. If an insect is resistant to the chemical, most of the offspring will also be resistant. Considering that insect generations can be a matter of weeks, insects in an area can become immune to a chemical within months.

• Mutation

• Natural Selection

• Genetic Drift

• Gene Flow

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A chemical spill causes the offspring of ladybugs to have blue dots instead of black dots.

• Natural Selection

• Genetic Drift

• Mutation

• Gene Flow

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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

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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

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Some organisms of a population of birds are born with extra-long beaks instead of a normal sized beak.

• Gene Flow

• Natural Selection

• Genetic Drift

• Mutation

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