Evolution quiz for AP Biology 2019

The allele that causes sickle-cell disease is found with greater frequency in Africa where malaria is a greater threat than in US. Why?

• heterozygote advantage

• heterozygote protection theory

• frequency-dependent selection

• neutral variation

Population of squirrels with an allele (B) causing a bushy tail and (b) bald tail is recessive. If 64% of squirrels have bushy tail, what is the frequency of the dominant allele?

• 0.8

• 0.6

• 0.4

• 0.2

Which of the following constitutes the smallest unit capable of population?

• individual

• group

• community

• population

When the phenotype of the population shifts to a darker fur color, this is called

• stabilizing selection

• directional selection

• disruptive selection

Leads to new species with certain traits desired by humans is called

• artificial selection

• homology

• gene pool

• founder effect

Constitutes all the alleles in a population.

• gene pool

• homology

• founder effect

• bottleneck effect

A result of drastic reduction in population size due to a sudden change in the environment.

• homology

• founder effect

• bottleneck effect

• artificial selection

According to this figure, which pair of organisms shares the most recent common ancestor?

• lungfish and amphibian

• amphibian and lizard

• mammal and crocodiles

• lizard and ostrich