6.2 Effects of Gene Flow

In Addition To Natural Selection, Two Other Mechanisms cause Changes to Alleles in a population

• Genetic variation

• Gene Flow

• Genetic Drift

• Point mutation

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What is the movement of genes into or out of a population

(Can cause a population to evolve)

• Genetic Drift

• Hydrosphere

• Open and close systems

• Gene Flow

Genetic Drift is changes in (a)  

Genetic Drift is a change in allele frequency's due to ____ Not Fitness

• Mutation

• Chance

• Style

• Natural Selection

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(a)   Genetic drift that results from an event that reduces the size of a population. Some alleles can be lost from the gene pool

Draw an example of bottleneck effect

_____ when a small number of individuals become isolated from the og population and colonize a new area

• Bottleneck effect

• Founder effect

• Hinting effect

• Isolation effect

Founder effect: Each new population has a distinct gene pool from the original population resulting in changes in allele frequency which reduces ____

• Genetic variation

• Genetic valuation

• Genetic drift

• Genetic Decorum

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Draw and example of founder effect

What can cause Bottleneck Effect?

• Disease

• Hunting

• Natural Disaster

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