Ch 18

There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off by random chance.  What is this an example of?

• Bottleneck Effect
• Hardy Effect
• Founder Effect
• None of These

When a population is in Hardy-Weinberg Equilibrium.  What is not happening to the species?

• Survival
• Reproduction
• Death
• Evolution

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Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation
• Adaptation
• Behavior
• Environment

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Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

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The theory of evolution by natural selection means that what is changing over time?

• The inherited traits of a population.
• The acquired traits of a population.
• Hair color and eye color
• Attractive features.

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

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Mutations are a change in what?

• DNA
• tRNA
• genotype
• phenotype

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is the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population.

• Extinction
• Genetic Drift
• Bottleneck Effect
• Founder Effect

If a population is not evolving , it is in genetic equilibrium. 

• True
• False

Sexual selection is a type of...

• Natural Selection
• Mutation
• Small Population Size
• Nonrandom Mating