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Genetics Review ALL

Total questions: 115

Worksheet time: 3hrs 52mins

Name
Class
Date
1.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
2.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
3.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
4.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
5.
T = tall an t = short
What is the phenotype for Tt?
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
6.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
7.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
8.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
9.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
10.
In a Punnett square each box represents a(n)....
a)
offspring
b)
parent
c)
gene
d)
trait
11.
The passing of physical characteristics from parent to offspring is __________.
a)
genetics
b)
heredity
c)
genes
d)
traits
12.
When a capital letter is used, what kind of allele is being represented?
a)
Recessive Allele
b)
Codominance
c)
Punnett Squares
d)
Dominant Allele
13.
When two identical alleles for a trait are in an organism, the organism is said to be ____________?
a)
Heterozygous
b)
Homozygous
c)
allele
d)
resseive
14.
outward appearance of an organism, regardless of its genes.
a)
phenotype
b)
genotype
c)
haploid
d)
deploid
15.
The genetic characteristics of recessive genes
a)
tend to mask the characteristics of dominant genes.
b)
are always expressed in the phenotype.
c)
are usually codominant.
d)
tend to be masked by the characteristics of dominant genes.
16.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
17.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
18.
Which choice best represents the genotype of this cross?
a)
1 Yy: 2 yy: 0 YY
b)
2 Yy: 2 yy: 0 YY
c)
3 Yy: 1 yy: 0 YY
d)
1 Yy: 3 yy: 0 YY
19.

Which of the following genotypes is homozygous dominant?

a)

aa

b)

Aa

c)

AA

20.

Which of the following genotypes is heterozygous?

a)

Bb

b)

BB

c)

bb

21.

The different forms of a gene

a)

alleles

b)

atoms

c)

proteins

d)

wheels

22.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
23.
What is the probability of a purple-horned unicorn if a heterozygous pink-horned unicorn is crossed with a heterozygous pink-horned unicorn?
a)
0%
b)
25%
c)
50%
d)
75%
24.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
25.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
26.

What is the genotypic ratio of the offspring?

a)

3:1

b)

1:3

c)

1:2:1

d)

2:2

27.

What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

a)

50 % Brown fur and 50% White fur

b)

25 % Brown fur and 75% White fur

c)

75 % Brown fur and 25% White fur

d)

0% Brown fur and 100% White fur

28.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
29.
B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
30.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
31.
The basic unit of heredity is called a(n):
a)
Gene
b)
Allele
c)
Phenotype
d)
Genotype
32.
A change in DNA:
a)
Mutation
b)
Phenotype
c)
Genotype
d)
Albinism
33.
The genetic makeup (allele combination) of an organism is called the:
a)
phenotype
b)
genotype
c)
probability
d)
heterozygous
34.

Which of the following genotypes would lead to a recessive phenotype?

a)

EE

b)

Ee

c)

ee

35.

If something is heterozygous, it is also _______.

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

36.

Mitosis

a)

occurs in a sex cell.

b)

occurs in a body cell.

c)

creates a cell with half the chromosomes.

d)

goes through two divisions.

37.
In a certain species of animal, black fur (B) is dominant over tan fur (b).  If two heterozygous parents were crossed what would the parent genotypes be?
a)
BBxbb
b)
BBxBb
c)
BbxBb
d)
bbxBb
38.
What do the letters on the outside of a Punnett Square represent?
a)
the genotypes of the parents
b)
the phenotypes of the parents
c)
the possible genotypes of the offspring
d)
the possible phenotypes of the offspring
39.
What do the letters inside the boxes of a Punnett Square represent?
a)
the genotypes of the parents
b)
the phenotypes of the parents
c)
the possible genotypes of the offspring
d)
the possible phenotypes of the offspring
40.

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

a)

They have same phenotype and genotype

b)

They have different phenotypes and genotypes

c)

They have same phenotype, but different genotypes

d)

They have different phenotypes, but the same genotype

41.
Which of the following is a hybrid?
a)
BB
b)
oo
c)
Bo
d)
AA
42.
If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?
a)
100 %
b)
75%
c)
50%
d)
25%
43.
If a father is AA and a mother is AB, what is the probability for a child with AB blood? 
a)
0%
b)
25%
c)
50%
d)
75%
44.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
45.
What types of blood can a person with AB RECEIVE?
a)
B only
b)
AB, A, B, O
c)
AB and O only
d)
A only
46.
What type of blood is the universal donor?
a)
O
b)
AB
47.
If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood?
a)
100 %
b)
75%
c)
50%
d)
25%
48.
If a red blood cell has no antigens on its surface, what is its blood type?
a)
A
b)
B
c)
AB
d)
O
49.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
50.

A father is heterozygous for his type A blood and a mother is heterozygous for her type B blood. What percentage of their offspring would you expect to have?

a)

50% all blood types

b)

25% Type A, 50% Type B, 25% Type O

c)

50% Type A, 50% Type B

d)

Type A 25%, Type B 25%, Type AB 25%, Type O 25%

51.

Name the proteins on the surface of red blood cells.

a)

Antibodies

b)

Antigens

c)

Plasma

d)

Collagen

52.
What is NOT a possible genotype for someone with type B blood?
a)
IBIB
b)
IAIB
c)
IB i
53.

___________ is when both the dominant trait and recessive trait are seen in the phenotype.

a)

Codominance

b)

Punnett squares

c)

Complete dominance

d)

Incomplete dominance

54.

In the image above, what is the percentage of the offspring has the possibility of inheriting blood type O?

a)

0%

b)

25%

c)

50%

d)

100%

55.

Which of the following codes for blood type O?

a)

IA IA

b)

IB i

c)

IA IB

d)

ii

56.
In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).
According to the Punnett square, what percentage of female offspring will have red eyes?
a)
0%
b)
25%
c)
50%
d)
100%
57.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
58.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
59.

A haemophilic man marries a normal homozygous woman. What is the probability that their son will be haemophilic?

a)

100%

b)

75%

c)

50%

d)

0%

60.

X linked recessive gene is ___________.

a)

always expressed in male

b)

always expressed in female

c)

lethal

d)

sub lethal

61.

When a woman, heterozygous for a sex-linked condition, mates with a male who has the condition what percentage of their offspring could have the condition?

a)

25%

b)

50%

c)

75%

d)

0%, but all would be carriers.

62.

When we say that a woman is a carrier for a genetic disease or disorder it means that

a)

she has 1 recessive allele, but not the disorder

b)

she has 2 recessive alleles for the disorder

c)

she has 1 recessive gene and will show the disorder

d)

she has 2 recessive genes and will not show the disorder

63.
Allison's father was colorblind. She realizes that she received his defective X-chromosome. However, she is not color blind. She is a what?
a)
Carrier
b)
Colorblind female
c)
Non-carrier
d)
Incapable of seeing purple
64.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
65.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
66.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?
a)
XNXN
b)
XnXn
c)
XNY
d)
XnY
67.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a female who is colorblind?
a)
XNXn
b)
XnXn
c)
XNXN
d)
XnY
68.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
69.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XBXB
d)
XbY
70.
In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).
According to the Punnett square, what percentage of offspring will have white eyes?
a)
0%
b)
25%
c)
50%
d)
100%
71.
Hemophilia is a recessive x-linked disorder. According to the Punnett square, what percentage of offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
72.
Hemophilia is a recessive x-linked disorder. According to the Punnett square, what percentage of offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
73.
I have 2 X chromosomes. What am I?
a)
Male
b)
Female
74.
I have 1 X chromosome and 1 Y chromosome. What am I?
a)
Male
b)
Female
75.

If a gene which causes a genetic disorder is found only on the X chromosome, it is said to be a (an) ______________.

a)

sex-linked trait

b)

polygenic trait

c)

codominant trait

d)

incomplete dominance trait

76.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
77.
The sex of a child is determined by
a)
whether the father's sperm contains an x or y chromosome
b)
whether the mother's egg contains an x or y chromosome
c)
the age of the parents
78.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
79.

Who can a father pass a sex linked gene to?

a)

Sons only

b)

Daughters only

c)

Both sons and daughters

80.

Who does a son inherit a sex linked allele from?

a)

His mother only

b)

His father only

c)

Either his father or mother

81.

Who could a daughter inherit a sex linked alled from?

a)

Her mother only

b)

Her father only

c)

Either parent

82.
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
83.

In a pedigree, which shape represents a male?

a)

circle

b)

square

84.

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

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

85.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

86.

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

87.

What is the mode of inheritance shown here?

a)

Recessive because it "skips" a generation

b)

Dominant because it shows up in every generation

88.

On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -

a)

the male is heterozygous and the female is heterozygous.

b)

the male is homozygous recessive and the female is homozygous dominant.

89.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
90.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
91.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
92.

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

a)

HH

b)

Hh

c)

hh

93.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
94.
What does a horizontal line between a square and a circle mean?
a)
They are siblings
b)
They are cousins
c)
They are married ("together")
d)
They are the children
95.
What does a vertical line coming down from a square and circle that are connected by horizontal line indicate?
a)
They are cousins
b)
The children
c)
Aunts and Uncles
96.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
97.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
98.
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
99.

Why do all the daughters in Generation II carry the colorblind gene?

a)

Because mom passed on the gene.

b)

Because dad passed on the X chromosome.

100.

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

101.

If this pedigree shows a recessive disorder, what MUST the genotype of individual II-3 be?

a)

HH

b)

Hh

c)

hh

102.

What do half colored symbols represent?

a)

The individual is a carrier (heterozygous).

b)

The individual has the phenotype

c)

The individual has both recessive alleles.

103.

This characteristic skips a generation. The trait in this pedigree must be

a)

Dominant

b)

Recessive

104.

This pedigree chart shows Freckles in this family. This characteristic is probably

a)

Dominant

b)

Recessive

105.

What type of heredity is shown in the pedigree?

a)

Sex-Linked Dominant

b)

Sex-Linked Recessive

c)

Autosomal Dominant

d)

Autosomal Recessive

106.
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
107.

The pedigree is showing a _____________ trait.

a)

autosomal dominant

b)

autosomal recessive

c)

sex linked recessive

108.

What are all the possible combinations this parent could produce in their sex cells?

a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
109.

What goes in box 3

a)

Aabb

b)

AABB

c)

AAbb

d)

aaBb

110.
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
111.
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
a)
3/16
b)
4/16
c)
8/16
d)
12/16
112.

This image is an example of a _____________ cross.

a)

Monohybrid

b)

Dihybrid

c)

Purebred

d)

Pure Breeding

113.

What would be the gametes for the YyRr plant?

a)

YR, YR, yR, yR

b)

YR, Yr, yR, yr

c)

Yy, Rr, YY, RR

d)

yy, rr, yy, rr

114.

What is the genotype that should be in the blank square?

a)

yyRr

b)

YYRR

c)

yyrr

d)

YrYr

115.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance

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