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Population Evolution Summative Assessment

Total questions: 39

Worksheet time: 2hrs 57mins

Name
Class
Date
1.
What do you call all of the genes in a population?
a)
Gene pool
b)
Relative Frequency
c)
Genetic Drift
d)
Allele pool
2.

What does the Hardy-Weinberg equilibrium measure?

a)

changes in allele frequencies over time

b)

numbers of mutations

c)

goodness of fit

d)

genetic diversity

3.

If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

a)

Directional selection

b)

Disruptive selection

c)

Stabilizing selection

d)

Sexual Selection

4.
In the Hardy-Weinberg Equation, q2 is the frequency of what?
a)
The recessive allele 
b)
the dominant allele
c)
the recessive genotype
d)
the dominant genotype
5.
What factor describes when populations increase because animals are moving into a population?
a)
Emigration
b)
Limiting Factors
c)
Immigration
d)
Exponential Growth
6.
What factor describes when populations decrease because animals are moving out of a population?
a)
Emigration
b)
Limiting Factors
c)
Immigration
d)
Exponential Growth
7.
A population is...
a)
A group of one species in one area
b)
Multiple species that live in one area
c)
All of the living and nonliving things in an area
d)
None of these
8.
What do you call all of the genes in a population?
a)
Gene pool
b)
Relative Frequency
c)
Genetic Drift
d)
Allele pool
9.
The measure of how common an allele is in a population is known as ___________.
a)
Allele Combination
b)
Allele Frequency
c)
Gene Pool
d)
Genotypic Frequency
10.
A population of pigs with small, medium, and long snouts lives on an island together with burrowing termites. Pigs that have the longest snouts tend to survive better. Over time, most of the pig population is made up of individuals that have very long snouts. This is an example of which type of selection?
a)
directional selection
b)
disruptive selection
c)
stabilizing selection
d)
sexual selection
11.

In the past, individuals in a population of seed eating birds had a wide variety of beak sizes. After many generations, the birds either have small beaks or large beaks, but medium size beaks are absent. If the number of birds with each beak size was graphed which example would it look like?

a)

A

b)

B

c)

C

12.
Which is a mechanism that causes a change in allele frequency?
a)
gene flow
b)
genetic drift
c)
natural selection
d)
all answers are correct
13.
Which Hardy-Weinberg equation represents the genotype frequencies in a population?
a)
p + q = 1
b)
p2 + 2pq + q2 = 1
c)
p2 + pq2 + q2 = 1
d)
p + 2pq + q3 = 1
14.
Which Hardy-Weinberg factor represents the frequency of heterozygous individuals in a population?
a)
p2
b)
2pq
c)
q2
d)
p2 + 2pq
15.

If finches with average sized beaks increase in a population while finches with large and small sized beaks decrease, which pattern of natural selection has occurred?

a)

Directional selection

b)

Disruptive selection

c)

Stabilizing selection

d)

Sexual Selection

16.
This mechanism of evolution occurs when populations migrate.
a)
Extinction
b)
Gene flow
c)
Genetic drift
d)
Natural Selection
17.

What is the best explanation for a population being described as an evolutionary unit?

a)

Populations evolve, not individuals

b)

Natural selection only involves individuals, not populations

c)

Genetic changes only occur in populations

d)

A population's gene pool remains the same throughout time

18.
A chance occurrence that negatively affects a population because the population is small.
a)
genetic drift
b)
mutation
c)
speciation
d)
migration
19.
The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is called
a)
the Hardy-Weinberg principle
b)
the founder effect
c)
directional selection
d)
the bottleneck effect
20.
Which of the following cannot introduce new alleles into a population's gene pool?
a)
Mutation
b)
Natural selection
c)
Gene Flow
d)
All of the above introduce new alleles into the population
21.
Which of the following is true of genetic drift?
a)
It can decrease genetic diversity in a population
b)
It is necessary in order for a population to be in equilibrium
c)
It can increase genetic diversity in a population 
d)
It plays a much larger role in determining the genetic makeup of populations than natural selection 
22.
What are sources of genetic variation?
a)
mutations
b)
genetic recombination
c)
mutations and genetic recombination
d)
mutations and migrations
23.
There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off because of human activity and only a few survived.  What is this an example of?
a)
Bottleneck Effect
b)
Genetic Drift
c)
Founder Effect
d)
Natural Selection
24.
What does the image represent?
a)
Founder effect
b)
Bottleneck effect
c)
Natural Selection
d)
Mutations
25.
What does the image represent?
a)
Gene flow
b)
Genetic drift
c)
Mutation
d)
Adaptation
26.
Yellow toucan birds seek out one another to make babies together and tend to avoid the green toucan birds.
a)
Genetic Drift
b)
Sexual Selection
c)
Gene flow
d)
Mutation
27.
Although their large and elaborate tail feathers make male peacocks more conspicuous to predators and hinder their ability to fly, female peacocks prefer bright colored tails in mates.  What is this an example of?
a)
Sexual Selection
b)
Gene Flow
c)
Genetic Drift
d)
No Mutations
28.

Disruptive selection will favor...

a)

extreme traits.

b)

average traits.

c)

one phenotype over another.

29.

Directional selection will favor...

a)

extreme traits.

b)

average traits.

c)

one phenotype over another.

30.
What is the correct explanation for what is happening in this graph?
a)
There are a lot of average-sized beaks
b)
There are no beaks
c)
There are a lot of small beaks only
d)
There are a lot of small and large beaks, but not average-sized ones
31.
What does the variable q represent?
a)
Frequency of the heterozygote genotype
b)
Frequency of the homozygous recessive genotype
c)
The frequency of the recessive allele
d)
The frequency of the dominant allele 
32.
What type of selection?
a)
Directional 
b)
Stabilizing
c)
Disruptive
33.

The unit used in studying evolution is the_______

a)

population

b)

individual

34.

In the 1800s, hunters killed all but twenty of a large population of northern elephant seals

a)

genetic drift

b)

gene flow

35.

Founder effect and bottlenecks are two extreme cases

a)

genetic drift

b)

gene flow

36.

Blue Jays introduce new alleles to oak forests as they make hundreds of round trips carrying acorns from oak trees a mile away to new soil in their home territory for winter.

a)

genetic drift

b)

gene flow.

37.

Which type of reproduction is best when the environment is stable?

a)

axsexual reproduction

b)

sexual reproduction

38.

Cockroaches becoming increasingly resistant to pesticides is an example of

a)

disruptive selection

b)

genetic drift

c)

directional selection

d)

stabilizing selection

39.

All of the following can allow a population to evolve EXCEPT

a)

small population size

b)

natural selection

c)

mutation

d)

no sexual selection

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