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CHAPTER 16 EVOLUTION OF POPULATIONS
Name:____________
Hr_____
16-1 Genes and Variation
Darwin didn’t know about ______________.
Genes have _____ forms, or ____________.
Which alleles are invisible?____________ Why?
Gene Pool:
Relative Frequency:
Define Evolution in genetic terms:
What are the two main sources of variation?
1.
2.
Mutation:
How do mutations occur?
1.
2.
3.
4.
Do mutations always affect phenotype?
Gene Shuffling occurs during ______________________________.
23 pairs of chromosomes in humans can produce _____ different combination of
gametes.
Single-gene trait:
Example:
Polygenic Traits:
Example:
16-2 Evolution as Genetic Change
Evolutionary fitness is an organism’s success in ______________________________
___________________evolve, not individuals.
Describe the evolution of the lizard population as an example of natural selection on
single-gene traits.
Natural selection can affect the distributions of phenotypes in three ways:
1.
2.
3.
Describe each of the above (1,2,3), give an example and draw the graph.
Genetic Drift:
Founder Effect
Hardy Weinberg Principle
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16-3 The Process of Speciation
Speciation
Isolating Mechanisms
Describe the evolution of Darwin’s Finches based on the work of Peter and Rosemary
Grant.
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Founders Arrive
Geographic Isolation
Changes in Gene Pool
Reproductive Isolation
Ecological Competition
Continued Evolution
What are some of the limits of research and unanswered questions?
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