Mechanisms of Evolution

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

A(n)________ is a measure of how common a certain allele is in a population.

• Allele Frequency

• Gene Pool

• Genotypical Number

• Genetic Drift

Which of the following best describes gene pool?

• The alleles only in the immediate family members

• A total set of different alleles in a population

• A frequency of given alleles in a population

• Half the number of the alleles within the population

Which of the following is an example of the bottleneck effect?

• Cheetah populations reach their lowest levels with reduced diversity and as they rebound are so genetically similar they appear to be inbred.

• Affected individuals with blue skin can trace their ancestry back to one of the first settlers in the region.

• The environment of a fox population changes and over time foxes who are white survive and pass on their genes to their offspring.

• Humans choose two dogs they like the characteristics of and breed them together.

Genetic drift is change in the allele frequency of a population due to...

• random chance

• natural selection

• non-random mating (sexual selection)

• artificial selection

Which of the following is an example of the founder effect?

• Bald Eagles are hunted until near extinction, population recovers.
• Small group of iguanas floats to an island, starts a new population.
• Red fox pups are more likely to survive in a snowy environment if they are born white.
• Farmer chooses seeds from largest apples to plant next year.  This results in larger apples from year to year.

is when genes (peoples) come into or leave a population

• Genetic Drift

• Founder Effect

• Gene Flow

• Bottleneck

Bahamian female birds preferred mating with white-feathered males and produces more white-feathered offspring than dark feathered offspring. Which process apples to this scenario?

• Gene Flow

• Natural Selection

• Mutation

• Non-Random Mating

Bats are common in Texas, especially in rocky regions. Bats with longer hang claws have demonstrated higher fitness because of their ability to cling to rock while resting.

• Adaptation
• Non-random mating
• Gene Flow
• Mutation

_______ are two sources of genetic variation in a population

• Bottleneck and Bacteria

• Small Population and Viruses

• Mutations and Recombination

• Founder Effect and Artificial Mating