Exam 4: Genes and Their Evolution: Population Genetics

In a classroom taste test for PTC the genotype frequency was determined to be P = .35 and Q = .65.After applying the Hardy-Weinberg equation,what was the percentage of genotypes found to be?

Familial hypercholesterolemia,an autosomal dominant disease,is five times more frequent in the Afrikaner population of South Africa than in the original population of Europe from which the ancestors to the Afrikaners immigrated.What does this demonstrate?

When individuals of the same species are reproductively isolated,genetic differences may accumulate in sufficient number so that new species could emerge.What would such an event be an example of?

Fitness trade-off refers to selection favoring which genotype?

Which of the following is an example of balanced polymorphism?

What is a cause of the absence of the A and B alleles in Native American populations?

Explain how the founder effect can lead to a descendent population that differs greatly from its parent population over a relatively short period of time.

What is a random change in allele frequencies over time known as?

While conducting research with a small population in South America,you note that an overwhelming majority of individuals exhibit signs of a specific genetic abnormality.What is most likely the cause of this?

What does the Hardy-Weinberg law of equilibrium assume?

Australian aborigines are an endogamous society.This means that marriage and reproduction take place within the group.What does this lead to?

What is the physical location of a gene within the genome called?

What are patrilocal societies expected to display?

What is likely the cause of the clinal decrease in type B blood from East Asia to Western Europe?

The type of selection that favored progressively larger brain size in human evolution is ________ selection.

What is another name for the evolutionary force called gene flow?

Studies of Galápagos finches have found that at certain points in time all finches on the island have either wide beaks or sharp narrow beaks.What is the type of evolution that leads to this phenotype distribution?

Which of the evolutionary forces is most likely to decrease variation between populations?

Transposable elements are DNA sequences that:

The southern migration of which African people may have led to a significant increase in the incidence of malaria?