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Population Genetics

Total questions: 36

Worksheet time: 53mins

Name
Class
Date
1.

Why is genetic drift not a type of natural selection?

a)

It's random; not due to advantages that the individual has

b)

It's due to the environment, rather than chromosomal changes

c)

Humans are involved, making genetic drift artificial selection

2.

What is the only way to create brand new alleles in an isolated population?

a)

Mutation

b)

Natural selection

c)

Genetic drift

d)

Nonrandom mating

3.

In order to have sexual selection occur, which of these must happen?

a)

Nonrandom mating

b)

Genetic drift

c)

Gene flow

d)

Nondisjunction

e)

Binary fission

4.

Male peacocks have beautiful blue and green plumage. However, this coloration makes them easier for tigers to hunt and kill. Why might they have these colors?

a)

Sexual preference by female peacocks

b)

Genetic drift randomly killed off all brown peacocks

c)

Peacocks mated with parrots a long time ago

d)

There is no reason - it's a horrible mutation with no advantage

5.

A volcano explodes and destroys half of an island. Any creature that happened to be on the north part of the island is now dead. This has changed the allele frequencies randomly. This is probably...

a)

Genetic drift

b)

Gene flow

c)

Natural selection

d)

Volcanic mutation

6.

Which of these can change allele frequencies in a population?

a)

Sexual selection

b)

Genetic drift

c)

Gene flow

d)

Natural selection

e)

All of these can change allele frequencies

7.

If the allele for long fur gives individuals an advantage, what is likely to occur over time?

a)

The frequency of that allele will increase

b)

The frequency of that allele with decrease

c)

Mutations can no longer affect that gene

8.

What is this image depicting?

a)

Gene flow

b)

Nonrandom mating

c)

Genetic drift

d)

Sexual selection

9.

Temperatures start rising in an environment with rabbits. What is a reasonable prediction for what happens to the allele for long, warm fur?

a)

Becomes less frequent in the population

b)

It is mutated by the changing temperatures

c)

Switches to its back-up mode of scales

d)

Long fur individuals war with short fur individuals

10.

In genetic drift, the allele frequencies in a gene pool change because of

a)

mutations

b)

genetic equilibrium

c)

natural selection

d)

chance

11.
Two organisms that are closely related would have
a)
very similar DNA sequence
b)
exactly the same DNA sequences
c)
no proteins in common
d)
completely different DNA sequence
12.
Which of the following is NOT a condition for Hardy-Weinberg Equilibrium?
a)
No mutations
b)
Random Mating
c)
No natural selection
d)
No offspring
13.
When a population is in Hardy-Weinberg equilibrium,  what is NOT happening to the species?
a)
Survival
b)
Reproduction
c)
Death
d)
Evolution
14.
There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off by random chance.  What is this an example of?
a)
Genetic Drift
b)
Hardy Weinberg Effect
c)
Founder Effect
d)
None of These
15.
What type of selection does the image represent?
a)
Directional 
b)
Stabilizing
c)
Disruptive
16.
What type of selection does the image represent?
a)
Directional 
b)
Stabilizing
c)
Disruptive
17.
What type of selection does the image represent?
a)
Directional 
b)
Stabilizing
c)
Disruptive
18.
Genetic drift is most likely to impact a population....
a)
That has a low mutation rate
b)
In which natural selection is occurring
c)
That is very small
d)
For which environmental conditions are changing
19.
Disruptive selection will favor...
a)
Both extremes of a trait.
b)
Average traits.
c)
One phenotype over another.
d)
All possible phenotypes
20.
Which Hardy-Weinberg factor represents the frequency of heterozygous individuals in a population?
a)
p2
b)
2pq
c)
q2
d)
p2 + 2pq
21.
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
22.
What do you call all of the genes in a population?
a)
Gene pool
b)
Relative Frequency
c)
Genetic Drift
d)
Allele pool
23.
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
24.
A population of 150 individuals has an allele frequency of 0.3 for the dominant allele (B) and a frequency of 0.7 for the recessive allele (b). Use the Hardy-Weinberg equation to determine the frequency of the genotype (Bb).
a)
0.09
b)
0.42
c)
0.49
d)
0.21
25.
A population of 150 individuals has an allele frequency of 0.3 for the dominant allele (B) and a frequency of 0.7 for the recessive allele (b). Use the Hardy-Weinberg equation to determine the frequency of the genotype (bb).
a)
0.09
b)
0.42
c)
0.49
d)
0.21
26.
Two groups of chipmunks cannot mate anymore because the grand canyon separates them; this is
a)
Behavioral isolation
b)
Geographic isolation
27.
What is speciation?
a)
combining of tow species to form one with different traits
b)
isolation that affects mating behaviors
c)
timing of mating that prevents normal sexual selection
d)
divergence of two or more species from an existing one
28.
Individual organisms can acquire traits throughout their lives that help them survive and reproduce; then they can pass those acquired traits on to their offspring.
a)
true
b)
false
29.
The Hardy-Weinberg Model is...
a)
available at local hobby stores and retailers throughout the Greater Tazewell area.
b)
a mathematical tool that biologists can use to predict allele frequencies and determine whether or not evolution is occurring within a population.
c)
always occurring within individual organisms in nature.
d)
only useful in the lab and cannot be practically applied to real-world populations of organisms.  
30.
What does the Hardy-Weinberg equilibrium measure?
a)
changes in allele frequencies
b)
numbers of mutations
c)
goodness of fit
d)
genetic diversity
31.
When two populations no longer interbreed, what is the result?
a)
genetic equilibrium
b)
reproductive isolation
c)
stabilizing selection
d)
recombinant DNA
32.
Mutations, crossing-over, genetic recombination, and random fertilization are all sources of
a)
genetic variation
b)
stabilizing selection
c)
genetic equilibrium
d)
genetic drift
33.
An inherited characteristic that increases an organism's ability to survive and reproduce in its specific environment is called a/an
a)
vestigial structure
b)
adaptation
c)
speciation
d)
analagous structure
34.
What is the best explanation for a population being described as an evolutionary unit?
a)
Population can 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
35.
What is speciation?
a)
combining of tow species to form one with different traits
b)
isolation that affects mating behaviors
c)
timing of mating that prevents normal sexual selection
d)
divergence of two or more species from an existing one
36.
A population of frogs has 37 individuals who are brown in color and 194 individuals who express the dominant green color. What is the dominant allele frequency for this population?
a)
0.2
b)
0.4
c)
0.6
d)
0.8

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