Exam 4: Genes and Their Evolution: Population Genetics

Studies of Darwin's finches have found that at certain points in time all finches on the island have either wide beaks or sharp narrow beaks. The type of evolution that leads to this phenotype distribution is:

Another name for the evolutionary force called gene flow is:

A study of Darwin's finches after a long period of drought found that all species of finch on one of the islands had developed wide beaks in order to break open seeds. The type of evolution that leads to this phenotype distribution is:

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

Which of the following is NOT a genetic disorder that decreases susceptibility to malaria?

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, the percentage of genotypes was found to be as follows:

The ABO and MN blood-type frequencies of the Dunkers differ significantly from those of current American and German populations due to:

Together, all of the alleles contained within a group of interbreeding individuals is known as a:

Spontaneous mutation is the result of:

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.

Familial hypercholesterolemia, an autosomal dominant disease, is five times more frequent in the Afrikaner population of South Africa than in the population of Europe or the United States. This represents an example of:

An individual who displays the disease sickle-cell anemia must have inherited the deleterious allele from both phenotypically normal parents. This individual is therefore:

Patrilocal societies are expected to display:

Frameshift mutations are more likely to have an impact at the phenotypic level because:

Mutations to which cells are most likely to have significant evolutionary consequences?

You are reading a scientific article about cheetahs that have stripes instead of spots. The article refers to this as a genetic mutation. Though you see they have no negative impact on the cheetahs' fitness, the stripes are nevertheless considered a genetic mutation because:

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

Why is a frameshift mutation far more likely to lead to a defective protein than a point mutation?

In certain species of nonhuman primates there are groups where only one dominant female has access to mates. The other females must wait until the opportunity to gain mate access presents itself. This will have direct impacts on " fitness," influencing which of the following?

Fitness trade-off refers to selection favoring which genotype?