Mechanism of Evolution

A random change in the DNA sequence resulted in blue eyes being introduced to the human population 10000 years ago.

• Mutation

• Natural Selection

• Gene Flow

• Genetic Drift

• Non-random Mating

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The Native American population now includes blue-eyed individuals following the migration of Europeans settlers to North America.

• Mutation

• Natural Selection

• Gene Flow

• Genetic Drift

• Non-random Mating

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During the Vietnam war, U.S. soldiers had children with Vietnamese women. The gene pool of the Vietnamese population had new alleles added to it as a result.

• Mutation

• Natural Selection

• Gene Flow

• Genetic Drift

• Non-random Mating

Northern elephant seals have reduced genetic variation probably due to hunting done by humans in the 1890s. Their population was reduced to as few as 20 individuals at the end of the 19th century.

• Mutation

• Natural Selection

• Gene Flow

• Genetic Drift

• Non-random Mating

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A population of red and blue flowers grows in a greenhouse. A gardener is shopping for new flowers to add to the garden and picks two red flowers. The red flowers are transplanted to her garden. After a few seasons, the flowers have spread their seeds and occupy a large portion of the garden. They are all red.

• Mutation

• Natural Selection

• Gene Flow

• Genetic Drift

• Non-random Mating

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A change in the gene pool of a population due to chance.

• Genetic drift

• Gene flow

• Mutation

• Natural selection

___________ is the process through which populations of living organisms adapt and change

• Genetic drift

• Gene flow

• Mutation

• Natural selection

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Darwin found the following finches on the Galapagos islands. What best describes why they have different beaks?

• Genetic variation has made it possible for birds to feed on different forms of food due to their beak shape.

• Genetic variation has made it possible for larger eyes on the birds to see.

• Genetic variation has made it possible for the birds to camouflage themselves on the island.

• Genetic has made it possible for the birds to feed at different times of the day due to competition.

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The allele frequencies of the mouse population in the picture are changing over time. Which is true?

• The population is evolving.

• The population is not evolving.

• The population will go extinct.

• The population's genetic variation is increasing.

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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.

• Genetic Drift

• Natural Selection

• Non-random mating

• Mutation

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