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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.
Created by: teruodaka