Question 1

What are the genetic consequences of inbreeding?

Accepted Answer

For a given allele, inbreeding increases the proportion of homozygotes in a population.

Question 2

Briefly define the term genetic equilibrium.

Accepted Answer

a condition for a population in which the frequency of a given gene remains constant from generation to generation

Question 3

Genetic drift is primarily associated with relatively small breeding populations.

Accepted Answer

A) True 
 B)False  True

Question 4

When all genotypes within a population do not have equal rates of survival, then allele
frequencies may change from one generation to the next by a process called

Accepted Answer

The answer of When all genotypes within a population do...

Question 5

Which would change allele frequencies more quickly: selection against a dominant allele or selection against a recessive allele?

Accepted Answer

The answer of Which would change allele frequencies more quickly:...

Question 6

What is the original source of genetic variation in a population? Which natural factors affect changes in this original variation?

Accepted Answer

The answer of What is the original source of genetic...

Question 7

A certain form of albinism in humans is recessive and autosomal. Assume that 1 percent of the individuals in a given population are albino. Assuming that the
population is in Hardy -Weinberg equilibrium, what percentage of the individuals in this population are expected to be heterozygous?

Accepted Answer

The answer of A certain form of albinism in humans...

Question 8

Migration occurs when individuals move between populations. Considering a single pair of alleles, A and a, which formula is used to indicate the new frequency of A in one generation of migration?

Accepted Answer

The answer of Migration occurs when individuals move between populations....

Question 9

Which single event is probably common to all occurrences of speciation?

Accepted Answer

The answer of Which single event is probably common to...

Question 10

One of the Hardy -Weinberg assumptions states that all genotypes in the population are free of selective advantage. What influence might a selective advantage of a
genotype have on a Hardy -Weinberg equilibrium?

Accepted Answer

The answer of One of the Hardy -Weinberg assumptions states...

Question 11

Mutations are regarded as a strong evolutionary mechanism for changing allelic frequencies.

Accepted Answer

A) True 
 B)False

Question 12

Assume that in a Hardy -Weinberg population, 9 percent of the individuals are of the homozygous recessive phenotype. What percentage are homozygous dominant?

Accepted Answer

The answer of Assume that in a Hardy -Weinberg population,...

Question 13

Which method is often used to analyze proteins and nucleic acids by physical separation when estimating genetic variation in populations?

Accepted Answer

A)   in situ hybridization
B)   electrophoresis
C)   centrifugation
D)   fluorometry
E)   absorption spectrophotometry

Question 14

Given an inheritance pattern of incomplete dominance and 81 flowers that are red (R1R1), 18 flowers that are pink (R1R2), and 1 flower that is white (R2R2), the frequency of the R1 allele is 0.9.

Accepted Answer

A) True 
 B)False

Question 15

Define the term fitness and relate it to the meaning of selection coefficient.

Accepted Answer

The answer of Define the term fitness and relate it...

Question 16

Natural selection occurs when there is nonrandom elimination of genotypes from a population due to differences in viability or reproductive success.

Accepted Answer

A) True 
 B)False

Question 17

Which term is given to the measure of the proportion of offspring that a particular phenotype will contribute to the next generation?

Accepted Answer

The answer of Which term is given to the measure...

Question 18

Assume that a trait is caused by the homozygous state of a gene that is recessive and autosomal. Nine percent of the individuals in a given population express the
phenotype caused by this gene. What percentage of the individuals would be heterozygous for the gene? Assume that the population is in Hardy -Weinberg equilibrium.

Accepted Answer

The answer of Assume that a trait is caused by...

Question 19

In small isolated populations, gene frequencies can fluctuate considerably. The term that applies to this circumstance is _.

Accepted Answer

A)   stabilizing selection
B)   natural selection
C)   allelic separation
D)   genetic drift
E)   genetic isolation

Question 20

Contrast directional and stabilizing forms of selection.

Accepted Answer

The answer of Contrast directional and stabilizing forms of selection....

Exam 22: Population and Evolutionary Genetics

What are the genetic consequences of inbreeding?

Briefly define the term genetic equilibrium.

Genetic drift is primarily associated with relatively small breeding populations.

When all genotypes within a population do not have equal rates of survival, then allele frequencies may change from one generation to the next by a process called

Which would change allele frequencies more quickly: selection against a dominant allele or selection against a recessive allele?

What is the original source of genetic variation in a population? Which natural factors affect changes in this original variation?

A certain form of albinism in humans is recessive and autosomal. Assume that 1 percent of the individuals in a given population are albino. Assuming that the population is in Hardy -Weinberg equilibrium, what percentage of the individuals in this population are expected to be heterozygous?

Migration occurs when individuals move between populations. Considering a single pair of alleles, A and a, which formula is used to indicate the new frequency of A in one generation of migration?

Which single event is probably common to all occurrences of speciation?

One of the Hardy -Weinberg assumptions states that all genotypes in the population are free of selective advantage. What influence might a selective advantage of a genotype have on a Hardy -Weinberg equilibrium?

Mutations are regarded as a strong evolutionary mechanism for changing allelic frequencies.

Assume that in a Hardy -Weinberg population, 9 percent of the individuals are of the homozygous recessive phenotype. What percentage are homozygous dominant?

Which method is often used to analyze proteins and nucleic acids by physical separation when estimating genetic variation in populations?

Given an inheritance pattern of incomplete dominance and 81 flowers that are red (R1R1), 18 flowers that are pink (R1R2), and 1 flower that is white (R2R2), the frequency of the R1 allele is 0.9.

Define the term fitness and relate it to the meaning of selection coefficient.

Natural selection occurs when there is nonrandom elimination of genotypes from a population due to differences in viability or reproductive success.

Which term is given to the measure of the proportion of offspring that a particular phenotype will contribute to the next generation?

In small isolated populations, gene frequencies can fluctuate considerably. The term that applies to this circumstance is _.

Contrast directional and stabilizing forms of selection.