Chapter 18 Review

Which is not one of the 5 H-W assumptions?

• No mutation

• No natural selection

• Random mating

• Extremely small populations

What is the definition of genetic variation?

• Differences between individuals in their genetic composition

• Differences between individuals in their observable compoistion

• Differences between individuals in their observable traits

• Differences between people, animals, and plants

What is another difference name for a quantitative trait?

• Discrete trait

• Haploid

• Polygenic trait

• Phenotypic trait

T5. What does the image represent?

• Founder effect
• Bottleneck effect
• Mutation
• Natural Selection

If 98 out of 200 individuals in a population express the recessive phenotype, what percent of the population would you predict would be heterozygous?

• 70%

• 30%

• 42%

• 49%

What type of selection is depicted in the picture where one phenotype is favored?

• stabilizing

• directional

• disruptive

If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

• Directional selection
• Disruptive selection 
• Stabilizing selection

Over the years, white mice became extinct and darker mice survived. This is

• stabilizing selection

• directional selection

• disruptive selection

• due to exercise

What type of isolation occurs when two populations of the same species are separated by land barriers like rivers or mountains?

• geographical isolation

• temporal isolation

• adaptive ratiation

• behavioral isolaton

What type of isolation occurs when two populations of the same species do not have the same mating rituals or signals?

• geographical isolation

• temporal isolation

• adaptive ratiation

• behavioral isolaton