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Biology Unit 6 Test Review

Total questions: 129

Worksheet time: 3hrs 17mins

Name
Class
Date
1.
In watermelons, green rinds (G) are dominant to striped rinds (g).  What is the genotype of a heterozygous green watermelon?
a)
GG
b)
Gg
c)
gg
d)
green
2.
In cacti, long arms (A) are dominant to short arms (a).  Suppose 2 heterozygous cacti are crossed.  What percentage of their offspring are expected to have short arms?
a)
0%
b)
25%
c)
75%
d)
100%
3.
One of the two forms of a gene is called a(n)
a)
genotype
b)
allele
c)
hybrid
d)
trait
4.
When a person has two different alleles for a gene, they are said to be
a)
heterozygous
b)
homozygous
5.
A __________ allele always shows up in an organism when the it is present.
a)
dominant
b)
hybrid
6.
In this example, the child displays the ________ trait.
a)
dominant
b)
recessive 
7.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
8.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
9.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
10.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
11.
aa always shows up as
a)
dominant
b)
recessive
12.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
13.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
14.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
15.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
16.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
17.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
18.
the physical characteristics that result from genes
a)
phenotype
b)
genotype
c)
heterozygous
d)
homozygous
19.

If a homozygous dominant allele (AA) is crossed with a homozygous recessive allele (aa), all of the resulting offspring will be

a)

Homozygous dominant

b)

Heterozygous

c)

Homozygous Recessive

20.

In guinea pigs, the allele for short hair is dominant. If all the guinea pigs are born short haired what are the possible genotypes of the parents? (There are two possible combinations.)

a)

Ss + Ss

b)

SS + SS

c)

SS + Ss

d)

ss + ss

21.

This type of inheritance pattern is a MIXTURE of two traits. This is known as ---

a)

incomplete dominance.

b)

codominance

22.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

23.

When one allele is not dominant over another, resulting in a blended phenotype for heterozygous offspring is considered....

a)

Incomplete Dominance

b)

Codominance

24.

Which of the following genotypes code for the blood type AB?

a)

IA IA and IA IB

b)

IA IB only

c)

IA IB and IB i

d)

ii only

25.

Which of the following are genotypes for blood type B?

a)

IA IA and IA IB

b)

IB IB and ii

c)

IB IB and IB i

d)

IA IB and IA IB

26.

A woman with curly hair and a man with straight hair produced a child with wavy hair:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

27.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
28.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
29.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
30.
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
31.
If you cross a black chicken with a white chicken, only checkered chickens would be produced.  What kind of inheritance pattern does this follow?
a)
incomplete Dominance
b)
Co-Dominance
32.
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%
33.
In some carnations, flower color exhibits codominance.  Identify the correct genotypes for red, white, and speckled carnations.
a)
Red = RR, white = rr, speckled = Rr
b)
Red = RR, white = WW, speckled = rw
c)
Red = RR, white = ww, Speckled = Rw
d)
Red = RR, white = WW, speckled = RW
34.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
35.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
36.

2.Which blood type would not be possible for children of a type AB mother and a type A father?

(a)  

37.

3.If two white rabbit produce a black offspring, the parent’s genotypes for color must be:

a)

heterozygous

b)

homozygous black

c)

homozygous white

d)

not enough information was given

38.

A black male and white female produced this grey offspring:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

39.

Radish color is incompletely dominant, red and white are pure breeding colors. While heterozygous are purple.


Cros a red radish with a white.

a)

4 purple

b)

1 red, 2 purple, 1 white

c)

2 red, 2 white

d)

1 red, 1 purple, 2 white

40.

Which of the following are genotypes for blood type B?

a)

IA IA and IA IB

b)

IB IB and ii

c)

IB IB and IB i

d)

IA IB and IA IB

41.

Which of the following is true about blood type O?

a)

It contains antigen A only.

b)

It contains antigen B only.

c)

It contains both antigen A and antigen B.

d)

It doesn’t contain antigen A or antigen B.

42.

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%

43.

Which of the following refers to a complete dominant cross?

a)

One allele completely dominates over the other.

b)

The two alleles are equally seen in the heterozygous genotype.

c)

The two alleles are blended in the heterozygous genotype.

d)

Neither allele is seen in the phenotypes.

44.

Which of the following genotypes code for the blood type AB?

a)

IA IA and IA IB

b)

IA IB only

c)

IA IB and IB i

d)

ii only

45.

Which of the following codes for blood type O?

a)

IA IA

b)

IB i

c)

IA IB

d)

ii

46.

The image above shows the incomplete dominant cross where D codes for straight hair in dogs and d codes for curly hair in dogs. The incomplete dominant trait is wavy hair. Which of the following statements is true about the offspring?

a)

Only the heterozygous genotype can code for wavy hair.

b)

Only the homozygous dominant genotype can code for wavy hair.

c)

Only the homozygous recessive genotype can code for wavy hair.

d)

The homozygous recessive and homozygous dominant genotypes can code for wavy hair.

47.

The proteins found on the surface of RBCs that allow us to type blood as A, B, O or AB are called

a)

antigens

b)

antibodies

c)

aggluntates

d)

Rh factors

48.

What is produced by your body in response to foreign antigens, such as the wrong type of blood?

a)

agglutinates

b)

clotting factors

c)

phagocytes

d)

antibodies

49.

Which blood type has Type A antibodies?

a)

Type AB

b)

Type O

c)

Type B

d)

Type B and Type O

50.
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%
51.
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%
52.

A woman has type B blood and her husband has type O blood. What must be the woman's genotype, if they have a child with type O blood?

a)

IB i

b)

IB IB

c)

ii

d)

type B blood

53.

If a father is IA IA and a mother is IA IB, what is the probability for a child with AB blood type?

a)

0%

b)

25%

c)

50%

d)

75%

54.
What type of blood is the universal donor?
a)
O
b)
AB
55.
What is NOT a possible genotype for someone with type B blood?
a)
IBIB
b)
IAIB
c)
IB i
56.
which blood type is the universal donor (all people can receive it)?
a)
O
b)
AB
c)
A
d)
B
57.

What inheritance patterns makes the blood type AB possible?

a)

incomplete dominance

b)

multiple alleles

c)

codominance

d)

total dominance

58.

What is the inheritance of color blindness an example of?

a)

co-dominance

b)

continuous variation

c)

karyotype cross

d)

sex linkage

59.

For haemophilia, let H be the normal allele and h the mutant allele.


Which is the genotype of the unaffected male?

a)

XhY

b)

XHXH

c)

XHXh

d)

XHY

60.

Which of the following explains why color blindness is more common in males? Tick two.

a)

The mutant allele for color blindness is carried by the X chromosome.

b)

The mutant allele for color blindness is carried by the Y chromosome.

c)

Male has only one X chromosome, so either allele is expressed.

d)

Female has two X chromosomes, so either allele is expressed.

61.

Color blindness is carried by the X chromosome.


A mother is a carrier of color blindness. Her husband has normal vision.


The probability of having a color blind offspring is (a)   percent.

62.

The diagram shows the sex chromosomes of a woman and of a man. Their genotypes for a recessive sex-linked condition are also shown.


What are the chances that their daughter will show the sex-linked condition?

a)

0%

b)

25%

c)

50%

d)

75%

63.
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
64.
An individual's sex is determined by 
a)
1 of 23 chromosomes
b)
2 of 46 chromosomes
c)
4 of 92 chromosomes
65.
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
66.
When we say that a woman is a carrier for a genetic disease or disorder it means that
a)
she has 1 gene, but not the disorder
b)
she has 2 genes for the disorder
c)
she can pass the gene only to male children
d)
she can pass the gene only to female children
67.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
68.
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
69.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
70.

How many alleles does a child get from each parent for a trait?

a)

1

b)

2

c)

3

d)

4

71.

Aa, DD, Bb, yy are all examples of ---

a)

genotypes.

b)

phenotypes.

72.

What you see, or the physical appearance of an organism, is called the ---

a)

genotype.

b)

phenotype.

73.
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
74.

In a pedigree, which shape represents a male?

a)

circle

b)

square

75.

Which gender has an X and a Y chromosome?

a)

male

b)

female

76.

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

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

77.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

78.

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

79.

What is the mode of inheritance shown here?

a)

Recessive because it "skips" a generation

b)

Dominant because it shows up in every generation

80.

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.

81.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
82.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
83.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
84.

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

a)

HH

b)

Hh

c)

hh

85.

How are women represented on a Pedigree?

a)

Triangle

b)

Circle

c)

Square

d)

Octagon

86.

How are men represented on a Pedigree?

a)

Rectangle

b)

Circle

c)

Square

d)

Hexagon

87.

If a circle or square is completely shaded in, that means ________________.

a)

he or she is dominant.

b)

he or she is missing a trait.

c)

he or she is affected.

d)

he or she is a carrier.

88.

If one or both parents have the disorder or the disorder is seen in many generations, the disorder is ________________.

a)

Homozygous

b)

Dominant

c)

Recessive

d)

Sex-linked

89.

If one or neither of the parents have the disorder, but a child has the disorder, the disorder is _______________.

a)

Autosomal

b)

Dominant

c)

Recessive

d)

Heterozygous

90.

If mostly males are affected in the pedigree, the disorder is said to be ________________.

a)

Dominant

b)

Recessive

c)

Autosomal

d)

Sex-linked

91.

If both males and females are affected int the pedigree, the disorder is said to be ________________.

a)

Autosomal

b)

Sex-linked

c)

Dominant

d)

Recessive

92.

A _____________ is a diagram that shows the genotypes and phenotypes of organisms from one generation to the next

a)

Dihybrid cross

b)

Punnett square

c)

Pedigree

d)

Monohybrid cross

93.

What type of heredity is shown in the pedigree?

a)

Sex-Linked Dominant

b)

Sex-Linked Recessive

c)

Autosomal Dominant

d)

Autosomal Recessive

94.
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
95.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
96.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
97.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia. 
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY 
98.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
99.

Which of the following is an autosomal recessive disorder?

a)

Huntington's disease

b)

sickle cell anemia

c)

colorblindness

d)

Hemophilia

100.

Which of the following is a autosomal dominant disorder?

a)

Huntington's

b)

Cystic fibrosis

c)

Hemophilia

d)

Sickle cell anemia

101.

A normal human zygote should have _____ chromosomes inside.

a)

46

b)

23

c)

92

d)

64

102.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
103.
Which genotype represents a sickle cell carrier? (Remember it is recessive)
a)
SS
b)
ss
c)
Ss
104.
Which genotype represents a patient that suffers from sickle cell disease? (it is recessive)
a)
ss
b)
Ss
c)
SS
d)
sy
105.
How many copies of the sickle cell gene are needed for a person to have the disorder?
a)
0
b)
1
c)
2
d)
3
106.
Sickle red blood cells have a decreased ability to carry 
a)
nutrients
b)
wastes
c)
oxygen
d)
proteins
107.

When you look at the cells of individuals with sickle cell anemia, what do you expect to see?

a)

C-shaped cells

b)

S-shaped cells

c)

Disk-Shaped Cells

d)

Globular shaped cells

e)

Sick cells

108.

Sickle Cell is inherited in a _________ pattern.

a)

Autosomal Dominant

b)

Autosomal Recessive

c)

Codominant

d)

Incompletely dominant

109.

Normal RBC

a)

A

b)

B

110.

Sickled RBC

a)

A

b)

B

111.

Human males are much more likely to have hemophilia than human females. This is the case because: (3.2.2)

a)

the gene for hemophilia is carried on the Y chromosome

b)

hemophilia is carried on autosomes

c)

the gene for hemophilia is sex-linked

d)

hemophilia is a contagious disease to which males are more susceptible

112.

What type of inheritance is shown in the pedigree below? (3.2.2)

a)

autosomal dominance

b)

codominance

c)

incomplete dominance

d)

sex-linked recessive

113.

Which of the following is homozygous recessive?

a)

RR

b)

Rr

c)

rR

d)

rr

114.

Which genotypes are heterozygous?

a)

EE

b)

tt

c)

Rr

d)

Both EE and tt

115.

Which genotypes are homozygous dominant?

a)

EE

b)

tt

c)

Rr

d)

Both EE and tt

116.

Which genotypes are homozygous?

a)

EE

b)

tt

c)

Rr

d)

Both EE and tt

117.

_____ is the genetic makeup of an organism.

a)

phenotype

b)

genotype

118.

A ____ is a region of DNA that controls a trait.

a)

gene

b)

phenotype

c)

chromatin

d)

genotype

119.

Passing traits from parents to their offspring

a)

Genetics

b)

Heredity

c)

Punnett square

d)

Monohybrid cross

120.

What is this?

a)

Pedigree

b)

Karyotype

c)

Venn diagram

d)

Punnett Square

121.

Is this trait (the shaded individuals) dominant or recessive?

a)

dominant

b)

recessive

122.

What does a filled in square represent?

a)

Not affected Female

b)

Not affected Male

c)

Affected Male

d)

Affected Female

123.

A man carrying the allele for Huntington’s disease marries a woman who is homozygous recessive for the allele. What is the probability that their offspring will develop Huntington’s disease?

a)

25 percent

b)

50 percent

c)

75 percent

d)

100 percent

124.
What disease is characterized by abnormally shaped red blood cells?
a)
hemophilia
b)
sickle cell anemia
c)
phenylketonuria
d)
Huntington's 
125.
Which genetic disorder is caused by a dominant allele?
a)
Huntington's
b)
Hemophilia
c)
Cystic fibrosis
d)
PKU
126.
Which disorder is characterized by the inability to break down a specific amino acid and can be treated by a special diet?
a)
Huntington's
b)
Tay Sachs
c)
Cystic fibrosis
d)
PKU
127.
This genetic disorder is inherited by a recessive allele found on the X chromosome.
a)
PKU
b)
Cystic fibrosis
c)
Down's syndrome
d)
Hemophilia
128.
Which genetic disorder is sex-linked?
a)
Huntington's
b)
cystic fibrosis
c)
red-green colorblindness
d)
sickle cell anemia
129.
Which disorder is characterized by degradation of the nervous system and usually results in death during infancy?
a)
Tay-Sachs
b)
Cystic fibrosis
c)
Huntington's
d)
PKU

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