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Genetics Reivew

Total questions: 112

Worksheet time: 2hrs 9mins

Name
Class
Date
1.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
2.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
3.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
4.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
5.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
6.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
7.
Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit?
a)
height
b)
the scar
c)
ability to swim
d)
ability to play drums
8.
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%
9.
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
10.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
11.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
12.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
13.

Punnett Square #1

In plants tall is dominant to short.

Cross two heterozygous plants.

What is the genotypic ratio?

a)

1:2:1

b)

2:2

c)

3:1

14.

Punnett Square #1

In plants tall is dominant to short.

Cross two heterozygous plants.

What is the phenotypic ratio?

a)

1:2:1

b)

2:2

c)

3:1

15.

Which of the choices is heterozygous?

a)

BB

b)

Bb

c)

bb

16.

Which of the choices is homozygous recessive?

a)

BB

b)

Bb

c)

bb

17.

Which of the choices is homozygous dominant?

a)

BB

b)

Bb

c)

bb

18.

Which of the choices are dominant? (there may be more than one)

a)

BB

b)

Bb

c)

bb

19.

Which of the choices is recessive?

a)

BB

b)

Bb

c)

bb

20.

The ratio of homozygous dominant to heterozygous

to homozygous recessive offspring

a)

Genotypic Ratio

b)

Phenotypic Ratio

c)

Monohybrid Cross

d)

Homologous Pair

21.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
22.

Who is considered the "father" of modern genetics?

a)

Einstein

b)

Mendel

c)

Disney

d)

Washington

23.
What type of "square" helps us solve genetic problems?
a)
carpenter square
b)
Mendel square
c)
Punnett square
d)
genetic square
24.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous 
25.
The exact genetic makeup of an organism, such as RR, Tt, PP is its?
a)
phenotype
b)
dominance
c)
genotype
d)
trait
26.
Y for yellow body is dominant over y for blue body.  What alleles would produce yellow bodies?
a)
YY,yy
b)
Yy,yy
c)
YY only
d)
YY,Yy
27.
Females-XX; MalesXY.  A couple has 4 girls.  What is the chance the next child will be a boy?
a)
75%
b)
100%
c)
25%
d)
50%
28.
If "T" is the allele for tall and "t" is the allele for short, then Tt would produce?
a)
tall
b)
short
c)
medium
d)
not enough info
29.
A physical characteristic that can be passed from parent to offspring.
a)
behavior
b)
trait
c)
strong muscles
d)
ability to fly a plane.
30.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
31.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
32.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
33.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
34.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
35.
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%
36.
When a person has two different alleles for a gene, they are said to be
a)
heterozygous
b)
homozygous
37.
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%
38.

An allele (T) for tongue-rolling is dominant over non-tongue rolling. What would be the genotypes of both parents if all of the offspring in the F1 generation are non-tongue rolling?

a)

TT X Tt

b)

Tt X tt

c)

tt X tt

d)

TT X tt

39.
Round seeds (R) are dominant over wrinkled seeds (r). What percentage of the offspring will be round from the following cross?
RR X Rr
a)
100%
b)
75%
c)
50%
d)
25%
40.
A homozygous round seeded plant is crossed with a homozygous wrinkled seeded plant. What percentage of the offspring will be homozygous recessive?
R = round
r = wrinkled
a)
75%
b)
50%
c)
25%
d)
0%
41.

The passing on of traits and behaviors from parents to their offspring is

a)

offspring

b)

heredity

c)

DNA

d)

genes

42.

Is weak, prefers to "hide"

a)

dominant genes

b)

trait

c)

recessive genes

d)

genes

43.

Something that is developed or learned over time

a)

acquired trait

b)

learned behavior

c)

learned

d)

acquired

44.

Only takes 1 in a gene pair for a trait to show up

a)

recessive genes

b)

DNA

c)

offspring

d)

dominant genes

45.

A physical feature that you are born with

a)

acquired trait

b)

inherited trait

c)

instinct

d)

learned behavior

46.

An instinct is a natural behavior that an organism is born knowing how to do automatically.

a)

True

b)

False

47.

A behavior is

a)

passed down from from parents to offspring through genes in cells

b)

something you do

c)

an action you are taught or learn from experience

d)

something you are born with

48.

A trait is a physical feature, part of an organism's outward appearance.

a)

False

b)

True

49.

Which statement/statements is/are true?

a)

Inherited traits are physical features that you are born with.

b)

An acquired trait is a physical feature that you get as a result of something you do or because of an experience.

c)

Inherited means to pass from offspring to parents through genes in cells.

d)

You are born with learned behaviors.

50.

A learned behavior is an action you are taught or learn from experience.

a)

True

b)

False

51.
The genotype of an organism describes the
a)
codons that make up the genes
b)
number of gene's on the chromosmes
c)
genetic make-up of a trait
d)
type of chromosomes in the nucleus
52.
Which best explains why children resemble their parents?
a)
they eat same foods
b)
they have similar DNA
c)
they speak the same language
d)
they have the same interests
53.
Which deals with the transmission of inherited traits from one generation to another?
a)
anatomy
b)
ecology
c)
genetics
d)
forensics
54.

Which term describes the different forms of a gene

a)

Chromosome

b)

Allele

c)

DNA

d)

Punnett Squares

55.

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

a)

genotypes

b)

phenotypes

56.

If something is heterozygous, it is also _____

a)

purebred

b)

hybrid

c)

dominant

d)

recessive

57.

If something is homozygous, it can also be called____

a)

phenotype

b)

genotype

c)

hybrid

d)

purebred

58.

Where is the majority of DNA stored within a cell?

a)

Chloroplast

b)

Cell wall

c)

Cell membrane

d)

Nucleus

59.

Which statement is true?

a)

Your DNA is identical to your siblings.

b)

Your DNA is identical to your father's.

c)

Your DNA is identical to your mother's.

d)

Your DNA is unique to you.

60.

Which of the following features is NOT inherited?

a)

Skin color

b)

Tatoo

c)

Hair texture

d)

Color blindness

61.
Jim has type AB blood. His dad could be type O.
a)
True
b)
False
62.

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%

63.

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

64.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
65.
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
66.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
67.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
68.
AA and Aa always show up as
a)
dominant
b)
recessive
69.
aa always shows up as
a)
dominant
b)
recessive
70.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
71.
What goes in box 1
a)
AABb
b)
AABB
c)
aabb
d)
AaBb
72.

Who is considered the father of modern genetics?

a)

George Washington

b)

Gregory Mendleham

c)

Frances Watson

d)

Gregor Mendel

73.

Alleles (example: H or h) are alternative forms of a gene. How many alleles does a baby guinea pig inherit from their mother?

a)

1

b)

2

c)

23

d)

whichever one is dominant

74.

A HETEROZYGOUS individual would have the genotype:

a)

Hh

b)

hh

c)

HH

d)

Hi

75.

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

a)

BB

b)

Bb

c)

bb

d)

None of the above, brown eyes are dominant.

76.

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

a)

25%

b)

50%

c)

75%

d)

100%

77.

If tall eyeballs (T) are dominant to short eyeballs (t), give the genotypes that are possible for tall eyeballs.

(a)  

78.

Genes determine the characteristics, or __?__, that an individual can have.

a)

chromosomes

b)

cells

c)

genetics

d)

traits

79.

Patrick Star recently married Patti. He is considered a purebred for his tall head shape (T), which is dominant over a short head (t). If Patti is a short-headed woman, what type of heads would their children have? (HINT: do a Punnett Square on a piece of paper)

a)

75% Tall and 25% short

b)

25% Tall and 75% short

c)

50% Tall and 50% short

d)

100% Tall

80.
Different variations of a gene are called?
a)
Alleles
b)
DNA
c)
Chromosome
d)
Gene
81.

The physical expression of a trait is called the ...

a)

genotype

b)

phenotype

82.

Genotype: TT

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous dominant

83.

Genotype: Aa

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous dominant

84.

The trait or allele that is expressed when only one is present is called the ___________ trait.

a)

dominant

b)

recessive

85.

In pea plants, tall (T) is dominant over short (t). If two heterozygous tall pea plants are mated, what is the the expected genotypic ratio of their offspring?

a)

3 tall : 1 short

b)

1 TT : 2 Tt : 1 tt

86.

Which statement below describes RECESSIVE alleles?

a)

expressed when at least one is present

b)

only expressed when 2 are present

87.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
88.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
89.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
90.
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%
91.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
92.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
93.

Who is known as the "father of genetics"?

a)

Charles Darwin

b)

Karl Ernst von Baer

c)

Gregor Mendel

d)

Francis Franklin

94.

A HETEROZYGOUS individual would have the genotype:

a)

Hh

b)

hh

c)

HH

d)

Hi

95.

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

a)

BB

b)

Bb

c)

bb

d)

None of the above, brown eyes are dominant.

96.

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

a)

25%

b)

50%

c)

75%

d)

100%

97.

Sections of DNA on a chromosome are called:

a)

nuclei.

b)

RNA.

c)

genes.

d)

traits.

98.
In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?
a)
100%
b)
75%
c)
50%
d)
25%
99.
The observable traits of an organism are known as its
a)
allele
b)
dominance
c)
phenotype
d)
genotype
100.
Each parent contributes one of the genes for a particular trait. The genes of the pair are called:
a)
variables
b)
gametes
c)
hybrids
d)
alleles
101.
In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is
a)
 25%
b)
 75%
c)
100%
d)
0%
102.
The color black is dominant in guinea pigs. The phenotypes of homozygous black guinea pigs and heterozygous black guinea pigs are:
a)
black
b)
gray
c)
BB and Bb
d)
white
103.
The gene makeup of an organism for a particular trait is known as its
a)
dominance
b)
phenotype
c)
allele
d)
genotype
104.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
105.
Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring?
a)
Gg
b)
gg
c)
GG
106.
In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?
a)
white and purple
b)
white 
c)
purple
d)
lavendar
107.
Dominant alleles are represented by a(n)
a)
phenotype
b)
lower case letter
c)
upper case letter
d)
punnett square 
108.
True or False:
A heterozygous dominant trait can be written as BB.
a)
True
b)
False
109.
D = dimples        d = no dimples 
What is the genotype for a homozygous recessive offspring?
a)
DD
b)
Dd
c)
dd
110.
What is the percentage of a homozyogus dominant offspring?
a)
75%
b)
50%
c)
25%
d)
0%
111.
Round (R) seeds are dominant to wrinkled (r) seeds.
What is the genotype for a homozygous dominant offspring?
a)
RR
b)
Rr
c)
rr
112.
What percentage of the offspring will be heterozygous dominant?
a)
100%
b)
75%
c)
50%
d)
25%

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