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Name _____________________________
Period _________
AP Biology
Date ______________________
NATURAL SELECTION GUIDED NOTES:
CH. 1:THE SCIENCE OF BIOLOGY
CH. 21: GENES WITHIN POPULATIONS
1. Where in the world did Darwin’s voyage take him and what did he study along the way?
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2. Define “descent with modification” ______________________________________________
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3. Evolution was not an idea original to Darwin, so what was Darwin’s key contribution to this
theory.____________________________________________________________________
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4. Distinguish between Lamarck’s concept of evolution and Darwin’s. ____________________
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5. What is the difference between natural selection and artificial selection? ________________
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6. On page 441, the book states, “only selection regularly produces adaptive evolutionary
change, but the genetic constitution of populations, and thus the course of evolution, can
also be affected by mutations, gene flow, nonrandom mating, and genetic drift.” Explain the
distinction.
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7. Describe two examples of documented cases of selection in natural populations which have
resulted in evolutionary change of a population.
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b. ______________________________________________________________________
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8. Define fitness (as it is used in evolutionary biology). ________________________________
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Name _____________________________
AP Biology
9. Explain “heterozygote advantage” and give an example.
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10. Distinguish between the three types of selection illustrated in these graphs of the distribution
of coat color in mice.
Original population
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