Population Genetics

A gene pool is

• all of the alleles in an individual

• all of the alleles in a population

• a body of water filled with fish

• all of the bases in one strand of DNA

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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. Which term best describes this scenario?

• gene flow

• bottleneck

• mutation

• founders

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Mutations are important because they bring about

• death of the organism in which they develop

• genetic variation needed for a population to evolve

• benefits for the individual, not for the population

• changes in genotype, but not phenotype

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Someone steps on some bugs and randomly removes their alleles from the population. This is an example of

• gene flow

• genetic drift

• speciation

• allele frequency

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What does the picture represent?

• Founder Effect

• Mutations

• Bottleneck effect

• Gene Flow

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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. Which term describes this scenario?

• Founder Effect

• Natural Selection

• Non-random mating

• Bottleneck

The Hardy-Weinberg Model is...

• available at local hobby stores and retailers throughout the Greater Tazewell area.

• a mathematical tool that biologists can use to predict allele frequencies and determine whether or not evolution is occurring within a population.

• always occurring within individual organisms in nature.

• only useful in the lab and cannot be practically applied to real-world populations of organisms.  

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Having a small gene pool can lead to extinction

• True

• False

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The percentage of an allele in the population.

• population genetics

• gene pool

• Hardy Weinberg equilibrium

• allele frequency

Select the best answer based on the image.

• Gene Flow

• Genetic Drift