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Genetics Test Review

Total questions: 84

Worksheet time: 2hrs 59mins

Name
Class
Date
1.

Which of the following is a homozygous genotype? (Select ALL that apply)

a)

AA

b)

Aa

c)

aa

2.

Which of the following is a heterozygous genotype? (Select ALL that apply)

a)

AA

b)

Aa

c)

aa

3.

In monsters, blue hair is dominant to green hair. Which genotype(s) will produce blue hair? (Select ALL that apply)

a)

BB

b)

Bb

c)

bb

4.

In monsters, blue hair is dominant to green hair. Which genotype(s) will produce green hair? (Select ALL that apply)

a)

AA

b)

Aa

c)

aa

5.

In hinkypunks (a made-up creature), having 4 tentacles are dominant over 5 tentacles. Which genotype(s) would produce a hinkypunk with 4 tentacles? (Select ALL that apply)

a)

HH

b)

Hh

c)

hh

6.

Is Bb dominant or recessive?

a)

dominant

b)

recessive

7.

Is bb dominant or recessive?

a)

dominant

b)

recessive

8.

R- round

r-wrinkled


What is the genotype for wrinkled?

a)

RR

b)

rr

c)

Rr

9.

Heterozygous is when...

a)

the alleles are the same

b)

the alleles are different

c)

the alleles are absent

d)

the alleles are present

10.

B = brown fur b = white fur

In the punnett square, what is the probability for white fur?

a)

0% (0/4)

b)

25% (1/4)

c)

50% (2/4)

11.

B = brown eyes

b = blue eyes

What is true about these two brothers that have brown eyes?

One has genotype BB the other Bb.

a)

they have same phenotype and genotype

b)

they have same phenotype but different genotypes

12.

What ratio of the offspring from the cross shown will be recessive for the trait of tallness?


Dominant: AA or Aa

Recessive: aa

a)

0 in 4

b)

1 in 4

c)

2 in 4

d)

4 in 4

13.

How much of the offspring pictured have a heterozygous result?

a)

25%

b)

50%

c)

75%

d)

100%

14.

Dominant: Smiley (E) Recessive: Frowning (e)

What is the genotype of a person who is frowning?

a)

EE

b)

Ee

c)

ee

15.

Dominant: Freckles (F); Recessive: No freckles (f)

What is the genotype of a person who has freckles? (2)

a)

FF

b)

ff

c)

Ff

16.

Dominant: Dimples (D); Recessive: No dimples (d)

What is the genotype of a person who has dimples?

a)

Dd

b)

DD

c)

dd

17.

Physical characteristics, or visible traits of an organism

a)

phenotype

b)

genotype

c)

trait

18.

Genetic letters/Makeup of an organism

a)

Genotype

b)

Allele

c)

Phenotype

19.

Two identical alleles for the same trait.

a)

Heterozygous

b)

Homozygous

c)

Dominant

20.

Two different alleles for the same trait.

a)

Heterozygous

b)

Homonzygous

c)

Dominant

21.

A trait that overpowers the other trait.

a)

Hybrid

b)

Dominant

c)

Recessive

22.

The Alleles bb are

a)

Heterozygous

b)

Homozygous Dominant

c)

Homozygous Recessive

23.

The allelles BB are

a)

Heterozygous

b)

Homozygous Recessive

c)

Homozygous Dominant

24.

The Alleles Bb are

a)

Homozygous

b)

Heterozygous

c)

Homozygous Dominant

25.

The physical characteristic an organism inherits from parents

a)

Behavior

b)

Skill

c)

Traits

26.

The allele that is weaker and will not show if a dominant allele is present

a)

Dominant

b)

Recessive

c)

Traits

27.

The Father of Genetics

a)

Gregory Smith

b)

Gregg Popovich

c)

Gregor Mendel

28.

Which of the following is a Phenotype?

a)

Bb

b)

Brown Eyes

29.

Which of the following is an example of Genotype?

a)

Tt

b)

Tall

30.

Which of the following Genotypes would be considered heterozygous

a)

BB

b)

gg

c)

Ff

d)

TT

31.
A dihybrid cross shows the possible outcomes of _______ 
a)
two alleles
b)
two parents
c)
two traits/characters
d)
a self pollination
32.
What gamete possibilities could come from this parent's genotype?
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
33.
What goes in box 1
a)
AABb
b)
AABB
c)
aabb
d)
AaBb
34.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
35.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
36.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
37.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
38.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
39.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
40.
parent 1: GgBB
parent 2: ggBb
Find the gametes for parent 1.
a)
GB, GB, gB, gB
b)
gB, gb, gB, gb
c)
Gg, BB, GB, GB
d)
gg, Bb, gB, gb
41.
R= red 
r= green
Which color is recessive?
a)
red
b)
green
c)
both
d)
brown
42.
Which trait is always expressed when present?
a)
recessive
b)
dominant
c)
phenotype
d)
allele
43.
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
a)
Ry
b)
RRyy
c)
RrYy
d)
Rryy
44.
Assume dad's gametes are on top, what is his genotype?
a)
AAPP
b)
AaPp
c)
aaPP
d)
Aapp
45.
Assume mom's gametes are on the left, what is her genotype?
a)
TTZz
b)
TtZz
c)
ttZZ
d)
TtZZ
46.

Red and White are incomplete dominant in snapdragons, so if we cross two heterozygous snapdragons what is the probability that the offspring would have a red phenotype?

a)

0%

b)

25%

c)

50%

d)

75%

47.

If color in hamsters show incomplete dominance, what would be the the expected genotypes for a cross between a homozygous white female with a heterozygous light tan male?

a)

Homozygous Brown

b)

Homozygous White

c)

Homozygous Tan

d)

Heterozygous Tan

48.

If the offspring of two orange salamanders included yellow, red, and orange individuals, what mode of inheritance is that?

a)

Complete Dominance

b)

Incomplete Dominance

c)

Codominance

d)

Multiple Alleles

49.

True or False:

For incomplete dominance, neither allele is dominant.

a)

True

b)

False

50.

True or False:

For codominance, neither alleles are dominant

a)

True

b)

False

51.

In cattle, coat color is controlled by codominance. If we cross a homozygous red parent with a homozygous white parent what would the phenotypes be?

a)

White

b)

Roan

c)

Red

d)

Tan

52.

This picture shows what the red blood cell of someone with sickle cell anemia. This disorder is carried on the X chromosome and is most common in sub-saharan populations. What type of inheritance pattern must it follow?

a)

codominance

b)

sex-linked inheritance

c)

multiple allele inheritance

d)

incomplete dominance

53.
ABO blood types are an example of what type of inheritance?
a)
multiple alleles
b)
incomplete dominance
c)
polygenic inheritance
d)
genetic mutations
54.
There are many variations in skin color that can be inherited based on the combination of alleles that you inherit from your mom and dad.  This bell curve distribution is an example of
a)
incomplete dominance
b)
codominance
c)
multiple alleles
d)
polygenic inheritance
55.
What gender of offspring are most often affected by sex-linked inheritance?  What gender are usually carriers of the trait?
a)
males, males
b)
females, males
c)
males, females
d)
females, females
56.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
57.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
58.
How much of your DNA do you inherit from your mom?
a)
10%
b)
25%
c)
50%
d)
it varies
59.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
60.
Which is the genotype of a male with a dominant sex-linked trait carried on the X chromosome? 
a)
XDY
b)
XDXD
c)
XDYD
d)
XdY
61.
Which two genotypes would have the same blood type?
a)
IAIA and IAi
b)
IBIB and IAIB
c)
IBi and ii
d)
IAIA and IAIB
62.
In chickens, feather color is codominant.  If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?
a)
50%
b)
0%
c)
25%
d)
100%
63.
Which of the following is a hybrid?
a)
BB
b)
bb
c)
Bb
64.
Why do we see only tall plants in the second generation?
a)
The gene for tall height is dominant
b)
The gene for short height is dominant
c)
The gene for tall height is recessive
d)
The parents did not have the tall gene
65.
In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are heterozygous for this trait, the percent of offspring expected to exhibit dwarfness is
a)
 25%
b)
100%
c)
50%
d)
0%
66.
What type of inheritance is determined by multiple genes located at different loci on different chromosomes and there can be a range of traits?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
67.
What do we use pedigrees for?
a)
To look at families
b)
To make determinations about the offspring
c)
To track traits in families
d)
Nothing
68.

In a pedigree, which shape represents a male?

a)

circle

b)

square

69.

On a pedigree, this symbol represents a ---

a)

not affected female.

b)

not affected male.

c)

affected male.

d)

affected female.

70.

On a pedigree, this symbol represents a ----

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

71.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

72.

How are individuals III-2 and II-4 related?

a)

Brother and sister

b)

Dad and daughter

c)

Uncle and niece

d)

Grandfather and granddaughter

73.

The trait this pedigree traces is recessive because it skips a generation and individuals can be carriers. What is the most likely genotype for person III-3?

a)

GG

b)

Gg

c)

gg

74.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
75.

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

a)

HH

b)

Hh

c)

hh

76.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
77.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
78.
How are individuals I-2 and III-5 related?
a)
Grandpa and grandson
b)
Mom and son
c)
Uncle and nephew
d)
Grandma and grandson
79.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
80.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
81.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
82.
What is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb
83.
What is the genotype of the father?
a)
AA
b)
aa
c)
Aa
d)
AA or aa
84.

Generation 2 individuals 5 and 6 are

a)

brother and sister.

b)

cousins.

c)

married.

d)

not related.

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