Unit 6: Population Dynamics

What is a gene?

• A sequence of DNA that codes for a particular trait

• A type of cell in the body

• A protein that provides energy

• A molecule that stores fat

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What does the term "gene pool" refer to?

• A collection of proteins in a cell

• All the genes present in a population

• A group of similar species

• A type of genetic mutation

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What is biological evolution?

• The process of cell division

• The change in a population’s gene pool over time

• The development of new species in a lab

• The increase in population size

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What is a mutation in biological evolution?

• A temporary change in the DNA sequence

• A permanent change in the DNA sequence within a gene in any cell

• The movement of organisms into a population

• The movement of organisms out of a population

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What does migration refer to in the context of biological evolution?

• A change in the DNA sequence

• The movement of organisms into or out of a population or environment

• The formation of new species

• The extinction of species

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What is natural selection?

• A process where individuals with certain traits are more likely to survive and reproduce.

• A method of artificially selecting traits in a laboratory.

• A random occurrence with no impact on species.

• A process that decreases genetic diversity.

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What is the result of natural selection on genetic traits?

• Traits are lost over generations.

• Traits are passed on to offspring.

• Traits become less common.

• Traits are randomly distributed.

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What is genetic drift?

• Evolution occurring by chance

• A process of natural selection

• Traits useful for survival

• A type of genetic mutation

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What is natural selection?

• Random changes in gene frequency

• A process where useful traits are passed on more frequently

• A sudden change in an organism's DNA

• A method of artificial breeding

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What two gentlemen coined the phrase "Survival of the fittest"?

• Charles Darwin

• Herbert Spencer

• Alfred Russel Wallace

• Thomas Huxley

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