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Unit 5: Genetics 2 Review

Total questions: 168

Worksheet time: 2hrs 6mins

Name
Class
Date
1.

A segment of DNA that codes for a trait

a)

gene

b)

centromere

c)

chromosome

d)

chromatid

2.

an observable characteristic

a)

trait

b)

personality

c)

cell

d)

DNA

3.

Genetic traits are determined by one or more

a)

genes

b)

organelles

c)

random chances

d)

cells

4.

A version or variation of a gene

a)

trait

b)

gene

c)

allele

d)

DNA

5.

The alleles that an organism has/inherits are its

a)

genotype

b)

phenotype

c)

chromosome

d)

recessive

6.

The observable expression of a trait is its

a)

phenotype

b)

genotype

c)

chromosome

d)

allele

7.

Long strands of DNA are wrapped into

a)

DNA

b)

Chromosome

c)

Alleles

d)

Phenotype

8.

______ is the set of genes possessed by someone

a)

Karyotype

b)

Fingerprint

c)

Genotype

d)

Phenotype

9.
Chromosomes are made of
a)
DNA
b)
RNT
c)
WWE
d)
DMA
10.

The physical expression of a trait.

a)

phenotype

b)

genotype

c)

chromosome

d)

allele

11.

Hair color and eye color are examples of a person's....

a)

recessive traits

b)

dominant alleles

c)

genotype

d)

phenotype

12.

The passing of traits from parents to offspring is known as....

a)

hierarchy

b)

heredity

c)

traits

d)

genetics

13.

What is the definition of Phenotype?

a)

The diagram that shows all the chromosomes of an individual

b)

The combination of alleles that control that an individual has for a particular trait

c)

How many genes on one chromosome

d)

How a trait is expressed (what it looks like or what it does)

14.

Segments of DNA are called _______________________

a)

Genes

b)

Alleles

c)

Traits

d)

Chromosomes

15.
Genes always appear in pairs. Your parents donate ________ allele for every trait.
a)
1
b)
2
c)
23
d)
46
16.

Which of the following is the correct definition for a genotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

17.

Which of the following is the correct definition for a phenotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

18.
Alternative forms of a gene are called
a)
Alleles
b)
Homozygous
c)
DNA
d)
Genetics
19.

What are the structures in this image called?

a)

chromosomes

b)

centromere

c)

sister chromatids

d)

chromatin

20.
The traits of an organism are passed to its offspring on small coded strands of DNA material called
a)
meiosis
b)
recessive traits
c)
genes
d)
heredity
21.

Which of the following genotypes is homozygous dominant?

a)

A

b)

Aa

c)

AA

d)

aa

22.

Example of homozygous genes are (select two)

a)

FF

b)

ff

c)

Ff

23.

An example of a heterozygous genotype is

a)

FF

b)

ff

c)

Ff

24.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
25.

Which of the following is homozygous dominant?

a)
Yy
b)
Y
c)
yy
d)
YY
26.

Which of the following alleles is homozygous recessive?

a)
Tt
b)
tt
c)
TT
d)
t
27.

Which of the following alleles is homozygous recessive?

a)
Tt
b)
tt
c)
TT
d)
t
28.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
29.

Which of the following is homozygous dominant?

a)
Yy
b)
Y
c)
yy
d)
YY
30.

In a Punnett square each box represents the probability of a(n) _______ trait.

a)

offspring's

b)

parent's

c)

gene's

d)

allele's

31.

Different forms of a trait a gene may have. Ex: R,r,T,t

a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
32.

A chart that shows all the possible combinations of alleles that can result from a genetic cross

a)
Gene
b)
Pedigree
c)
Punnett Square
d)
Dominant
33.

Where can the chromosome be found within the cell?

a)

mitocondria

b)

nucleus

c)
trait
d)

phenotype

34.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
35.

________ is the study of how traits are passed on from generation to generation, or inherited.

a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
36.

Brown hair is an example of which of the following

a)

Genotype

b)

Phenotype

c)

Neither

37.
What does the prefix hetero- in heterozygous mean?
a)
same
b)
different
c)
dating
d)
human
38.
The physical appearance of a trait is known as the-
a)
genotype
b)
phenotype
c)
characteristics
d)
intelligence
39.

The two-letter genetic code of an organism.

a)
Phenotype
b)
Genotype
c)
Physical Appearance
d)
Intelligence
40.
The different forms of a gene are called 
a)
traits
b)
chromosomes
c)
alleles
d)
peas
41.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
42.

What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)

a)

50 % Brown Hair and 50% Blond Hair

b)

25 % Brown Hair and 75% Blond Hair

c)

75 % Brown Hair and 25% Blond Hair

d)

0% Brown Hair and 100% Blond Hair

43.

Which genotype below best fits in box 2?

a)
BB
b)
Bb
c)
bb
d)

bB

44.

What is the probability of heterozygous offspring?

a)

0%

b)

100%

c)

50%

d)

25%

45.

Capitol letters of an allele represent?

a)

Dominant

b)

Trait

c)

Recessive

d)

Percentage

46.

Each individual square is worth what percent?

a)

25%

b)

50%

c)

10%

d)

100%

47.
Which of the following is heterozygous
a)
FF
b)
tt
c)
Gg
d)
RR
48.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
49.

Brown hair is an example of which of the following

a)

Genotype

b)

Phenotype

c)

Neither

50.

Blue eyes are considered to be ______________________ compared to brown eyes

a)

Dominant

b)

Recessive

c)

Homozygous

d)

Heterozygous

51.

Each parent provides what percentage of your traits?

a)

25%

b)

50%

c)

75%

d)

100%

52.

Which of the following is an example of a homozygous genotype?

a)

Rr

b)

rr

c)

NN

d)

Nr

53.

Which of the following is the correct definition for a genotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

54.

If your genotype is Bb, what type of trait would you express as a phenotype?

a)

Dominant

b)

Recessive

c)

Both the dominant and recessive traits

55.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
c)
dominant
d)
recessive
56.
AA and Aa always show up as
a)
dominant
b)
recessive
c)
homozygous
d)
heterozygous
57.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
58.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
59.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
60.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
61.
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 different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
62.
Hair colour is an example of
a)
genotype
b)
phenotype
63.
Having the genes for baldness is an example of
a)
genotype
b)
phenotype
64.
How tall you are is an example of
a)
genotype
b)
phenotype
65.
Being a carrier of a genetic disorder is an example of
a)
genotype
b)
phenotype
66.
Having blue eyes is an example of
a)
genotype
b)
phenotype
67.
Having genes that make you more likely to be good at sprinting is an aspect of
a)
genotype
b)
phenotype
68.
Usain Bolt trains daily to improve his muscular explosiveness. Muscle size is an example of
a)
genotype
b)
phenotype
69.
Look at the picture. The probability that a child will inherit the recessive trait is
a)
25%
b)
50%
c)
75%
d)
100%
70.
What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
71.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
72.

AA

a)

Dominant

b)

Recessive

73.

mm

a)

Dominant

b)

Recessive

74.

ee

a)

Dominant

b)

Recessive

75.

Phenotype or Genotype? HH

a)

Phenotype

b)

Genotype

76.

Phenotype or Genotype? Blue eyes

a)

Phenotype

b)

Genotype

77.

Phenotype or Genotype? Brown skin

a)

Phenotype

b)

Genotype

78.

Phenotype or Genotype? The combination of alleles/letters

a)

Phenotype

b)

Genotype

79.

Phenotype or Genotype? The physical expression/appearance of a gene

a)

Phenotype

b)

Genotype

80.

Phenotype or Genotype? bb

a)

Phenotype

b)

Genotype

81.
What is the dominant trait?
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
82.
What genotype would go in box 3?
a)
BB
b)
Bb
c)
bb
83.

The blending of two traits is known as ---

a)

incomplete dominance

b)

codominance

84.

A condition in which both alleles for a gene are expressed so that both traits are visible is known as ---

a)

Codominance

b)

Incomplete dominance

85.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
86.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
87.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
88.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
89.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
90.
Aa is
a)
homozygous
b)
heterozygous
91.
aa always shows up as
a)
dominant
b)
recessive
92.
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 different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
93.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
94.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
95.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
96.
Which of the characteristics is a lion least likely to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
97.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
98.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
99.
What ratio of the offspring from the cross shown will be homozygous recessive for the  trait of tallness? 
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
100.
AA and Aa always show up as
a)
dominant
b)
recessive
101.
AA and Aa always show up as
a)
dominant
b)
recessive
102.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
103.

If the dominant trait is having freckles (F) and the recessive trait is no freckles (f), which allele combination(s) below would represent a person who has freckles? (select all that apply)

a)

FF

b)

Ff

c)

ff

104.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair) 
a)
50 % Brown Hair and 50% Blond Hair 
b)
25 % Brown Hair and 75% Blond Hair 
c)
75 % Brown Hair and 25% Blond Hair 
d)
0% Brown Hair and 100% Blond Hair 
105.

The combination of genes a person has, represented by letters, is their...

a)

Genotype

b)

Phenotype

c)

Chromosome

d)

Punnett Square

106.

What belongs in the last box?

a)

RR

b)

Rr

c)

rr

d)

ff

107.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
108.

Look at the punnett square shown. What allele pair would replace the "?"

a)

WW

b)

Ww

c)

ww

109.

What belongs in Box 4?

a)

Y

b)

YY

c)

Yy

d)

yy

110.

Look at the punnett square. What is the probability that the offspring would have homozygous alleles for the trait?

a)

100%

b)

75%

c)

50%

d)

25%

e)

0%

111.
Both parents in this Punnet square
a)
are homozygous dominant
b)
are homozygous recessive
c)
are heterozygous
d)
have blue eyes
112.

What is the probability & phenotype of the offspring? (A-Brown hair; a-blond hair)

a)

50% Brown Hair and 50% Blond Hair

b)

25 % Brown Hair and 75% Blond Hair

c)

75 % Brown Hair and 25% Blond Hair

d)

0% Brown Hair and 100% Blond Hair

113.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

114.

Which of the following allele pairs is heterozygous?

a)

RR

b)

Qq

c)

ss

115.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
116.
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%
117.
A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
118.

Why do scientist use Punnett Squares?

a)

A tool scientist use to to see alleles

b)

A tool scientist use to see which alleles are dominant

c)

A tool scientist use to determine possible genotypes for offspring

119.

Which of the following is a Homozygous Dominant Genotype?

a)

Yy

b)

XX

c)

zz

120.

Which of the following is a homozygous recessive genotype?

a)

HH

b)

dd

c)

Aa

121.

Which of the following is a heterozygous genotype?

a)

Gg

b)

UU

c)

pp

122.

In a Punnett Square, 1 box is equal to 25%. How much are 3 boxes equal to?

a)

25%

b)

50%

c)

75%

d)

100%

123.

Fill in the Yellow Box

a)

AA

b)

Aa

c)

aa

124.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

125.

How chance the offspring born from this cross will have a homozygous dominant genotype?

a)

25%

b)

50%

c)

75%

d)

100%

126.

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

a)

0%

b)

25%

c)

50%

d)

100%

127.

What is the mother's genotype?

a)

DD

b)

Dd

c)

dd

128.

Offspring means

a)

Children

b)

Candy

c)

A Type of Spring

129.

What is the purpose of Punnett Squares?

a)

To make pretty tables/graphs

b)

To predict possible outcomes for offspring

c)

To predict which letters go in which box

130.

Dominant Traits

a)

Alleles that show their effect even if only 1 is present (Rules over the others)

b)

Alleles that show their effect only if both alleles are identical (Submits to others)

131.

Recessive Traits

a)

Alleles that show their effect even if only 1 is present (Rules over the others)

b)

Alleles that show their effect only if both alleles are identical (Submits to others)

132.

Dominant Traits are represented by ________ letters. Recessive Traits are represented by ________ letters.

a)

Capital

Lower Case

b)

Lower Case

Capital

133.

Genotype

a)

Letter combos (Combinations of alleles)

b)

Color or Look (The physical appearance of a trait)

134.

Phenotype

a)

Letter combos (Combinations of alleles)

b)

Color or Look (The physical appearance of a trait)

135.

Heterozygous

a)

Alleles are the different (Ex: Bb or Rr)

b)

Alleles are the same (Ex: BB or RR)

136.

Homozygous

a)

Alleles are the different (Ex: Bb or Rr)

b)

Alleles are the same (Ex: BB or RR)

137.

Alleles

a)

The genes from each parent

b)

A type of metal

138.

Mom has brown eyes (B). Dad has blue eyes (b). Which is the dominant?

a)

Brown is dominant because it is represented by a capital letter B.

b)

Brown is recessive because it is represented by a capital letter B.

c)

Blue is dominant because it is represented by a lowercase b.

139.

Which of the following is a HOMOZYGOUS DOMINANT genotype?

a)

Yy

b)

XX

c)

zz

140.

Which of the following is a homozygous recessive genotype?

a)

HH

b)

dd

c)

Aa

141.

Which of the following is a HETEROZYGOUS genotype?

a)

Gg

b)

UU

c)

pp

142.

In a Punnett Square, 1 box is equal to 25%. How much are 3 boxes equal to?

a)

25%

b)

50%

c)

75%

d)

100%

143.

Fill in the Yellow Box

a)

AA

b)

Aa

c)

aa

144.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

145.

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

a)

0%

b)

25%

c)

50%

d)

100%

146.

What is the mother's genotype?

a)

DD

b)

Dd

c)

dd

147.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
b)
Tall = T
Short = t
c)
Tall = t
Short = T
d)
Tall = TT
Short = tt
148.

Dominant alleles are represented by a:

a)

double gene

b)

lowercase letter

c)

recessive trait

d)

capital letter

149.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
150.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
151.

The genotype Aa is called . . .

a)

Homozygous recessive

b)

Heterozygous

c)

Allele

d)

Homozygous dominant

152.

Which of the following would be a phenotype?

a)

Aa

b)

red hair

c)

heterozygous

d)

DNA

153.

Which of the following is homozygous dominant?

a)

Yy

b)

Y

c)

yy

d)

YY

154.

Which of the following is homozygous recessive?

a)

Tt

b)

tt

c)

TT

d)

T

155.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
156.

If D=red and d=blue, what color would this frog be?

Dd

a)

Red

b)

Blue

c)

Purple

157.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
158.

Cuteness is a dominant trait in bunnies. Two bunnies heterozygous for cuteness have numerous offspring. What percentage of the offspring would be predicted to not be cute?

a)

100%

b)

75%

c)

50%

d)

25%

159.

Having more than 5 fingers (Polydactyly) is a dominant trait. What is the probability that two people, each with 5 fingers per limb will have a 6-fingered child?

a)

100%

b)

75%

c)

50%

d)

0%

160.

A heterozygous individual is mated with a homozygous recessive individual. What percentage of their children will be heterozygous?

a)

100%

b)

50%

c)

25%

d)

0%

161.

Fluffy fur is a dominant trait in guinea pigs. Two fluffy guinea pigs have a non-fluffy offspring. Click option the that represents possible genotypes of the parents.

a)

AA & AA

b)

Aa & AA

c)

aa & aa

d)

Aa & Aa

162.

If two heterozygous individuals are mated, what percentage of their offspring will have the dominant phenotype?

a)

100%

b)

75%

c)

50%

d)

25%

163.
George Guinea Pig met Greta Guinea Pig at a picnic.  George is heterozygous for his long hair, but Greta has short hair.  What are the chances of having a baby guinea pig with short hair?
a)
100%
b)
75%
c)
50%
d)
25%
164.
George Guinea Pig met Greta Guinea Pig at a dance.  George is heterozygous for his long hair, but Greta has short hair.  What are the chances that their baby would have long hair?
a)
100%
b)
75%
c)
50%
d)
25%
165.
George Guinea Pig met Greta Guinea Pig at a party.  George is heterozygous for his long hair, but Greta has short hair.  What are the chances that they would have a heterozygous baby?
a)
100%
b)
75%
c)
50%
d)
25%
166.
George Guinea Pig met Greta Guinea Pig at a party.  George is heterozygous for his long hair, but Greta has short hair.  How can we describe Greta's genotype?
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
167.
Stuart Snail is heterozygous for tall eyeballs.  Sally Snail has tall eyeballs but does carry the recessive allele.  What are the chances that their baby snail would have short eyeballs?
a)
75%
b)
50%
c)
25%
d)
0%
168.
If brown eyes are dominant over blue eyes, what would be the  parent genotypes if two heterozygous brown eyed persons were crossed?
a)
BB and bb
b)
BB and Bb
c)
Bb and Bb
d)
bb and Bb

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