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Quiz 7 Cards.
How Populations Evolve.
|What is a gene pool?||A gene pool is a collection of all genes in a population.|
|What are two main sources of genetic variation in a population’s gene pool?|
|There are only 1,000 people in this population. What evolutionary mechanism might cause a loss of genetic diversity in small populations like this?|
|What is gene flow, and how does it relate to what is happening to this population?|
|A chance event like a drought can have a huge effect on small populations like this, especially when some of the population leave to colonize a new area. Is this an example of the bottleneck effect or the founder effect?|
|What will happen to the frequency of the sickle cell allele in the population: will it increase, decrease, or stay the same?|
|Using your answer from the previous question, identify what type of natural selection this population is undergoing: directional selection, stabilizing selection, or disruptive selection.|
|What are the five factors that cause populations to evolve? Describe each in your own words.|
|Give an example of each of the five factors that cause populations to evolve.|