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3/2 Genetics Review

Total questions: 93

Worksheet time: 1hrs 10mins

Name
Class
Date
1.

The following genotypes are ​ (a)   ​ : Tt, Mm and Gg​ ​

Choose from the below words
heterozygous
homozygous
2.

The following physical descriptions are ​ (a)   hair color, eye color, height.

Choose from the below words
phenotypes
genotypes
3.

The same gene can come in different versions, the different versions of a gene are called

(a)  

Choose from the below words
Alleles
Chromosomes
Traits
4.
Which combination is Homozygous Dominant
a)
HH
b)
Hh
c)
hh
d)
hH
5.

Which Combination is Heterozygous

a)

AA

b)

Aa

c)

aa

d)

none of the above

6.

Another word for heterozygous is

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

7.

Which of the following would produce a recessive phenotype?

a)

hh

b)

Rr

c)

Ww

d)

BB

8.

If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

9.

A recessive allele is only expressed when a dominant allele is not present

a)

Law of dominance

b)

Law of inheritance

10.

Different traits are inherited independently of each other

a)

Law of independent assortment

b)

Genetics law

11.

If R is the allele for red flowers and r is the gene for white flowers, draw a flower that has genotype rr

12.

If R is the allele for red flowers and r is the gene for white flowers, draw a flower that has genotype Rr

13.

If curly hair is dominant to straight hair, draw someone with genotype hh

14.

If brown hair is dominant to red hair, draw someone with genotype Bb

15.

If bushy black eyebrows are dominant to thin black eyebrows, draw the eyebrows this person will have if his genotype is EE

16.
What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?
a)
Genesis
b)
Elective traits
c)
Alleles
d)
Quadrants
17.
What do we call the result of the genotype (for example, the color of the peas)?
a)
Visible traits
b)
Physiotrait
c)
Genotype 2
d)
Phenotype
18.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
19.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
20.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
21.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
22.
Gregor Mendel's "P" generation consisted of purple flower plants crossed with white flower plants. What were the results of this cross?
a)
All purple flower offspring
b)
All white flower offspring
c)
Some purple flowers and some white flowers
23.
A __________ is a segment of DNA that codes for a particular protein, which leads to a particular trait.
a)
Gene
b)
Allele
c)
Codon
d)
Nucleotide
24.
Which of the following best describes a GENOTYPE?
a)
The allele/genetic makeup of an organism.
b)
The physical expression of a trait.
25.
Which of the following is an example of a heterozygous genotype?
a)
RR
b)
Rr
c)
rr
26.
The letters on the TOP AND SIDE of a punnett square represent ______________.
a)
The combination of alleles in offspring.
b)
The possible alleles given by the parents following meiosis.
c)
The genotype and phenotype of offspring.
d)
The results of genetic mutations in offspring.
27.

What is the predicted percentage of homozygous recessive offspring in this cross?

a)

0%

b)

25%

c)

50%

d)

75%

28.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
29.
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
30.
The dominant trait in this punnett square is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
31.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
32.
How are Incomplete Dominance and Co Dominance different than a normal Mendelian cross?
a)
There is no difference
b)
The heterozygous genotype has a unique phenotype
c)
There is no heterozygous genotype
d)
There is only one phenotype regardless of genotype.
33.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
34.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
35.
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
36.

Codominant and incompletely dominant traits have three phenotypes instead of two. How many alleles (versions of the gene) are involved?

a)

1

b)

2

c)

3

d)

4

37.

In snapdragons, flower color is an incompletely dominant trait. Which genotype will lead to a third blended phenotype?

a)

Homozygous dominant

b)

Heterozygous

c)

Homozygous recessive

38.

Red is incompletely dominant to white in snapdragons. Which cross would result in 100% pink flowers?

a)

RR x rr

b)

rr x rr

c)

Rr x Rr

d)

RR x RR

39.

In humans, curly hair is dominant to straight hair, and wavy hair is an intermediate texture. Which explanation most likely accounts for wavy hair?

a)

a mutation occurred, producing wavy hair

b)

a different set of genes resulted in wavy hair

c)

inheritance occurred through incomplete dominance

d)

inheritance occurred as a result of a gene from only one parent

40.

In chickens, black is co dominant with white feathers. Which cross would result in 50% black and white feathers?

a)

BW x BW

b)

BB x WW

c)

BW x WW

d)

WW x BB

41.

In a certain breed of cattle, both red and white hairs show up together. This is an example of which type of inheritance pattern?

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

polygenic inheritance

42.

What is name for traits that are controlled by many genes such as height and skin color?

a)

complete dominance

b)

incomplete dominance

c)

co dominance

d)

polygenic

e)

multiple alleles

43.

What are the genotypes for type A blood?

a)

IAIA

b)

IAIB

c)

IAi

d)

IBIB

e)

ii

44.

A child has blood type AB. Which blood types would his parents most likely have?

a)

B and O

b)

O and A

c)

A and B

d)

AB and O

45.

Which could NOT result from a cross between IAIB and IAi?

a)

Type A Blood

b)

Type B Blood

c)

Type AB Blood

d)

Type O Blood

46.
What does heterozygous mean?
a)
An organism that has the same genes for a trait (TT or tt)
b)
An organism that has different genes for a trait (Tt)
c)
When neither gene is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
47.

A woman homozygous for A blood marries a man heterozygous for B blood. What is the probability that they will produce offspring with AB blood?

a)

0%

b)

25%

c)

50%

d)

75%

48.

What is the chance of a parent with blood types AB and a parent with blood type O producing an offspring with blood type O?

a)

0%

b)

25%

c)

50%

d)

100%

49.

A roan cow shows co-dominance in fur color (red and white). What is the expected phenotypic ratio if a roan cow and a roan steer mate together?

a)

100% Red

b)

1: Red: 1 White

c)

1 Red: 1 Roan

d)

1: Red: 2  Roan: 1 White

50.

A red flowered plant is crossed with a white flowered plant. The gene for petal color in these plants expresses incomplete dominance. What percentage of the offspring will have pink flowers?

a)

0%

b)

25%

c)

50%

d)

100%

51.

In chickens, feather color is codominant. If a homozygous black chicken is mated with one that is heterozygous black and white, what is the probability of having a chicken that is black and white?

a)

1/4

b)

1/2

c)

3/4

d)

100%

52.
when one allele is not completely dominant over the other - blending of two traits
a)
Codominance
b)
Complete dominance
c)
incomplete dominance
d)
none of these
53.
condition in which both alleles for a gene are expressed when present - both traits are visible
a)
Codominance
b)
Dominance
c)
Complete dominance
d)
Incomplete dominance
54.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
55.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
56.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
57.

The different forms of a gene are called

a)

traits

b)

pollinators

c)

alleles

d)

hybrids

58.

the passing of traits from parents to offspring

a)

genotype

b)

probability

c)

heredity

d)

selective breeding

59.

having two identical alleles for a particular gene (HH, hh)

a)

heterozygous

b)

homozygous

c)

multiple alleles

d)

trait

60.

any change in the DNA of a gene or a chromosome

a)

genetic engineering

b)

carrier

c)

polygenic inheritance

d)

mutation

61.
Trait that ALWAYS shows up in an offspring.
a)
Recessive allele
b)
Dominant allele
c)
gene
d)
Heterozygous
62.
Trait that is masked or covered up.
a)
Ressesive 
b)
Dominant 
c)
Homozygous
d)
Heterozygous
63.
A person's Phenotype is the ___________.
a)
set of genes 
b)
passing of traits 
c)
physical expression of the gene 
d)
allele represented by a capital letter
64.
An allele for a dominant trait i represented by _______.
a)
symbols
b)
numbers
c)
capital letters
d)
lowercase letters
65.
An allele for a recessive trait is represented by  __________________.
a)
symbols 
b)
numbers 
numbers
c)
capital letters 
d)
lower case letters
66.

What does A indicate?

a)

A male that has the trait.

b)

A female that has the trait.

c)

A female that does not have the trait.

d)

A male that does not have the trait.

67.

What does B indicate?

a)

line that indicates someone likes each other

b)

line that indicates a marriage

c)

line that indicates a relationship of parents and children

d)

A male that does not have the trait.

68.

How many generations are represented in the pedigree?

a)

2

b)

3

c)

4

d)

5

69.

In the diagram, individual III-3 indicates

a)

a female with no freckles

b)

a male with no freckles

c)

a male with freckles

d)

a female with freckles

70.

In the diagram, individual II-1 indicates

a)

a female with no freckles

b)

a male with no freckles

c)

a male with freckles

d)

a female with freckles

71.

What is the Genotype of individual I-1?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

72.

What is the Genotype of individual II-6?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

73.

What is the Genotype of individual III-2?

a)

FF

b)

Ff

c)

ff

d)

Can't know for sure

74.

What do the circles represent?

a)

Male

b)

Female

75.

What do the squares represent?

a)

Male

b)

Female

76.

Examine the parents in generation I. How many children do they have?

a)

3

b)

5

c)

6

d)

7

77.

Examine the parents in generation I. How many grandchildren do they have?

a)

2

b)

4

c)

6

d)

11

78.

Examine the parents in generation I. How many great grandchildren do they have?

a)

0

b)

2

c)

3

d)

5

79.

The shaded shapes represent individuals with attached earlobes (ee). What is the genotype of the generation I parents?

a)

ee

b)

Ee

c)

EE

d)

It is not possible to determine

80.

Examine the parents in generation I. What is the genotype of their boys?

a)

EE or Ee

b)

EE or ee

c)

Ee or ee

d)

ee

81.

Segments of chromosomes that contain coded information for an organisms trait

a)

cells

b)

genes

c)

alleles

d)

genotypes

82.

The outward expression, or appearance, of a genetic trait is its

a)

allele

b)

pedigree

c)

phenotype

d)

inheritance

83.

A model that is used to show possible outcomes of cross breeding is a

a)

ratio

b)

coin toss

c)

pedigree

d)

Punnett square

84.
 Look at the Punnett square.
If the two parents represented in the Punnett square have four offspring, what does the Punnett square tells you? 
a)
Two of the offspring will definitely have the genotype Aa.
b)
It is more likely that two of them will have the genotype Aa than the genotype aa.
c)
There is a 50% chance for each of the four offspring to have the genotype Aa.
d)
It is less likely that two of them will have the genotype Aa than the genotype aa.
85.
An individual with two different alleles for a specific trait is said to be: 
a)
homozygous
b)
heterozygous
c)
homogeneous
d)
heterogeneous
86.
Phenotype refers to the _________ of an individual
a)
genetic makeup
b)
actual physical appearance
c)
recessive alleles
d)
dominant alleles
87.
When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ______________ allele.
a)
dominant
b)
recessive
c)
both
d)
neither
88.
An organism that has two identical genes for a trait is said to be
a)
heterozygous for the trait
b)
hybrid for the trait
c)
homozygous for the trait
d)
incompletely dominant for the trait
89.
One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring having a white color.
a)
100%
b)
25%
c)
75%
d)
50%
90.
One cat carries homozygous, long-haired traits (SS), and its mate carries homozygous short-haired traits (ss). Use a Punnett square to determine the probability of one of their offspring having long hair.
a)
100%
b)
25%
c)
75%
d)
50%
91.
How many males are shown in this pedigree?
a)
8
b)
5
c)
2
d)
16
92.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
93.
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

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