Question 1

In any given population the genotype frequency is usually the same as the allele frequency.

Accepted Answer

A) True 
 B)False  False

Question 2

The genetic variation of a population is a result of differences in the _______ sequences of individuals and provides the raw material for evolution.

Accepted Answer

DNA

Question 3

Antibiotic resistance in bacteria could be combated by all of the following methods, except

Accepted Answer

A)   investing money in the design of new drugs.
B)   prescribing antibiotics only for bacterial diseases.
C)   improving hospital sanitation.
D)   prescribing antibiotics for viral diseases. D

Question 4

Larger male elephant seals have more mates than smaller male elephant seals because they are better at defending their territory (and mates). This is an example of __________ ___________.

Accepted Answer

The answer of Larger male elephant seals have more mates...

Question 5

Genetic drift has a greater effect on

Accepted Answer

A)   moths than on birds.
B)   individuals than on populations.
C)   small populations than on large populations.
D)   natural selection than on gene flow.

Question 6

A few members of a species establish themselves on a small island far from other populations of that species. They may experience a genetic bottleneck due to the _______ effect.

Accepted Answer

The answer of A few members of a species establish...

Question 7

A gene has two alleles, D and d.The frequency of the D allele is 0.2. What is the frequency of the d allele? Show your work.

Accepted Answer

The answer of A gene has two alleles, D and...

Question 8

Which of the following factors is not likely to cause major changes in allele frequencies?

Accepted Answer

A)   microevolution
B)   gene flow
C)   mutation
D)   natural selection

Question 9

In your backyard, you step on a dandelion and one of its seeds gets trapped in the tread of your shoes. The next day, you go on a long hike in the wilderness wearing the same shoes. When you step in a mud puddle, the seed sticks in the mud. The seed grows into a dandelion, but no other dandelions are present to mate with it. This is an example of

Accepted Answer

A)   gene flow.
B)   genetic drift.
C)   natural selection.
D)   sexual selection.

Question 10

In __________ selection individuals with one extreme of an inherited phenotypic trait have an advantage over other individuals in the population.

Accepted Answer

The answer of In __________ selection individuals with one extreme...

Question 11

A gene has two alleles, B and b. If the b allele becomes "fixed" in the population, its frequency will be _______ percent.

Accepted Answer

A)   0
B)   33.3
C)   50
D)   100

Question 12

In the Hardy-Weinberg equation, _______ represents the predicted frequency of the heterozygous genotype.

Accepted Answer

The answer of In the Hardy-Weinberg equation, _______ represents the...

Question 13

The human allele that causes six fingers per hand is dominant over the allele that produces five fingers per hand. Yet most humans have five fingers per hand. Why is this so?

Accepted Answer

A)   A Punnett square shows this situation to be impossible.
B)   The F2 generation never expresses the dominant trait.
C)   The heterozygote expresses the recessive trait.
D)   The six-finger allele exists at a low frequency in the human population.

Question 14

Natural selection is a random process.

Accepted Answer

A) True 
 B)False

Question 15

Mutations generally cause rapid changes in allele frequencies in populations.

Accepted Answer

A) True 
 B)False

Question 16

In the figure below, the flying bird moves permanently into the population shown on land. 
As a result, the allele frequency of A changes from

Accepted Answer

A)   1 to 0.75.
B)   0 to 0.25.
C)   0 to 0.75.
D)   1 to 0.25.

Question 17

A new allele spreads from one large population to another as a result of genetic flow.

Accepted Answer

A) True 
 B)False

Question 18

If a given population has 30 RR individuals, 10 Rr individuals, and 10 rr individuals, what is the allele frequency of R?

Accepted Answer

A)   0.10
B)   0.30
C)   0.50
D)   0.70

Question 19

Scientists have hypothesized that the reason European men have darker skin color than European women is that more than 10,000 years ago, these men preferred to mate with lighter-skinned females. If this is true, skin color is an example of ________ in Europeans.

Accepted Answer

A)   gene flow
B)   a genetic bottleneck
C)   sexual selection
D)   recombination

Question 20

Which of the following processes does not lead to an increase in recombination?

Accepted Answer

A)   fertilization
B)   crossing over
C)   independent assortment of chromosomes
D)   DNA repair

Exam 17: Evolution of Populations

In any given population the genotype frequency is usually the same as the allele frequency.

The genetic variation of a population is a result of differences in the _______ sequences of individuals and provides the raw material for evolution.

Antibiotic resistance in bacteria could be combated by all of the following methods, except

Larger male elephant seals have more mates than smaller male elephant seals because they are better at defending their territory (and mates). This is an example of _.

Genetic drift has a greater effect on

A few members of a species establish themselves on a small island far from other populations of that species. They may experience a genetic bottleneck due to the _______ effect.

A gene has two alleles, D and d.The frequency of the D allele is 0.2. What is the frequency of the d allele? Show your work.

Which of the following factors is not likely to cause major changes in allele frequencies?

In __________ selection individuals with one extreme of an inherited phenotypic trait have an advantage over other individuals in the population.

A gene has two alleles, B and b. If the b allele becomes "fixed" in the population, its frequency will be _______ percent.

In the Hardy-Weinberg equation, _______ represents the predicted frequency of the heterozygous genotype.

The human allele that causes six fingers per hand is dominant over the allele that produces five fingers per hand. Yet most humans have five fingers per hand. Why is this so?

Natural selection is a random process.

Mutations generally cause rapid changes in allele frequencies in populations.

In the figure below, the flying bird moves permanently into the population shown on land. As a result, the allele frequency of A changes from

A new allele spreads from one large population to another as a result of genetic flow.

If a given population has 30 RR individuals, 10 Rr individuals, and 10 rr individuals, what is the allele frequency of R?

Scientists have hypothesized that the reason European men have darker skin color than European women is that more than 10,000 years ago, these men preferred to mate with lighter-skinned females. If this is true, skin color is an example of ________ in Europeans.

Which of the following processes does not lead to an increase in recombination?