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Quiz 7 Cards.
How Populations Evolve.
Question | Answer |
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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. |