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WorksheetsGenetics Review
Total questions: 118
Worksheet time: 2hrs 17mins
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.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
3.
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
4.
Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?
a)
Purebred
b)
Hybrid
5.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
6.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
7.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
8.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
9.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
10.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
11.
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
12.
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%
13.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
14.
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
15.
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
16.
Which answer best describes codominant alleles?
a)
Both are equally dominant
b)
Both are equally recessive
c)
Neither are dominant or recessive
17.
Which of the following conditions results in mucus lining the lungs, liver, and digestive tract?
a)
cystic fibrosis
b)
sickle cell anemia
c)
Tay-Saachs
d)
Hunington's
18.
CF is passed to the child from a ____ gene from each parent
a)
dominant
b)
recessive
19.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
20.
What is the definition of phenotype?
a)
The physical expression of a trait
b)
The genetic combination of alleles
c)
A gene on the DNA strand
21.
What is the definition of genotype?
a)
The physical expression of a trait
b)
The genetic combination of alleles
c)
the genes on a DNA strand
22.
the condensed form of DNA is called________________
a)
an allele
b)
a gene
c)
a chromosome
d)
a phenotype
23.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
24.
Which of the following will only show if two alleles are present?
a)
a dominant trait
b)
a recessive trait
25.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
26.
Which of the following is a phenotype?
a)
Bb
b)
Black fur
27.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
28.
What percentage of the offspring in the punnett square are shown as a hybrid?
a)
100%
b)
75%
c)
50%
d)
25%
29.
What is the phenotype of the heterozygous parent in the punnett square?
a)
green
b)
yellow
c)
hybrid
d)
purebred
30.
In this punnett square, which is the dominant trait?
The B stands for bud.
The B stands for bud.
a)
purple flower bud
b)
white flower bud
c)
dominant
d)
recessive
31.
B=brown eyes
b= blue eyes
What is true about two brothers that have brown eyes?
One has genotype BB the other Bb.
b= blue eyes
What is true about 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
32.
A dog gives birth to 5 puppies. What percentage of the chromosomes does each puppy share with the mother?
a)
25%
b)
50%
c)
75%
d)
100%
33.
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
34.
If a heterozygous tall pea plant is crossed with a short pea plant, what are the possible genotypes of the future offspring?
a)
100% Tt
b)
50% Tt, 50% tt
c)
75%Tt, 25%tt
d)
25%TT, 50%Tt, 25%tt
35.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
36.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
37.
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%
38.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
39.
If a Homozygous red snapdragon and a Heterozygous pink snapdragon were crossed - what percentage of the offspring would be homozygous white?
a)
0%
b)
25%
c)
50%
d)
75%
40.
Snapdragon flowers come in red, pink and white. What type of inheritance is this?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
41.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
42.
The sex of an offspring is determined by ______________________.
a)
the mother
b)
the father
c)
the mother and the father
d)
by the environment
43.
Incomplete dominance means that the traits are
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
44.
Red/green color blindness is a recessive trait. A woman who is a carrier for this allele marries a normal-vision male. What is the probability that they will have a child who is color blind?
a)
1/4
b)
1/2
c)
3/4
d)
1
45.
Term for homozygous organisms that display two dominant phenotypes at the same time
a)
codominance
b)
incomplete dominance
c)
multiple alleles
d)
linked genes
46.
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?
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
47.
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
48.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
49.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
50.
If something is heterozygous, it is also...
a)
purebred
b)
hybrid
c)
dominant
d)
recessive
51.
Which of the following terms refers to the different possibilities of a gene?
a)
chromosome
b)
DNA
c)
Punnett Squares
d)
allele
52.
True/False: Different genotypes can code for the same phenotype.
a)
True
b)
False
53.
This image shows a...
a)
Punnett Square
b)
Phenotype
c)
Genotype
d)
Dominant allele
54.
What does a Punnett Square help you do?
a)
Determine the ratio of phenotypes
b)
Determine the ratio of genotypes
c)
Predict possible traits the offspring will have
d)
All of the above
55.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
56.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
57.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
58.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
59.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
60.
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
61.
One reason for Mendel's success with genetic studies of peas was that he
a)
used only hybrid pea plants
b)
used peas with large chromosomes
c)
studied large numbers of offspring
d)
discovered the sources of variation in peas
62.
A woman with blood genotype I(A)i marries a man with blood genotype I(B)i. What is the probability that they would have a child with type O blood?
a)
1/1
b)
1/2
c)
1/3
d)
1/4
63.
A person with type O blood marries a person with type AB blood. Possible blood genotypes of their children are
a)
I(A)i and I(B)I(B)
b)
I(B)I(B) and I(A)I(A)
c)
I(A)i and I(B)i
d)
I(A)I(B) and ii
64.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive
65.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
66.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
67.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
68.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
69.
Passing of traits from one generation to the next
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
70.
The genetic characters transmitted from parent to offspring, taken collectively
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
71.
Scientific study of how traits are passed to offspring through genes
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
72.
Segment of DNA on a chromosome that contains instructions for protein synthesis and controls a particular inherited trait
a)
Gene
b)
Pedigree
c)
Punnett Square
d)
Dominant
73.
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
74.
A person who has one recessive allele for a trait, but does not have the trait
a)
Homozygous
b)
Selective Breeding
c)
Mutation
d)
Carrier
75.
Any permanent change in a gene or chromosome of a cell; may be beneficial, harmful, or have little effect on an organism
a)
Homozygous
b)
Selective Breeding
c)
Mutation
d)
Carrier
76.
Process by which humans cross organisms to produce offspring with certain desirable traits
a)
Homozygous
b)
Selective Breeding
c)
Mutation
d)
Carrier
77.
What characteristic would a child not inherit from parents?
a)
freckles
b)
eye color
c)
hair style
d)
dimples
78.
He is known as the father of modern day genetics.
a)
Gregory Mendel
b)
Greg Mendel
c)
Gregor Mendel
d)
Grace Mendel
79.
A human usually has _____ total chromosomes.
a)
6
b)
22
c)
4
d)
46
80.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
81.
What is another way of saying "hybrid"?
a)
heterozygous
b)
homozygous dominant
c)
homozygous recessive
d)
none of these choices
82.
HH crossed with Hh. What is the probability of hh?
a)
0%
b)
25%
c)
50%
d)
100%
83.
What is another way of saying "purebred"?
a)
homozygous
b)
dominant
c)
recessive
d)
heterozygous
84.
Offspring receives two sets of _____________ (one from each parent)
a)
blue jeans
b)
genes
c)
machines
d)
pedigree
85.
How many pairs of chromosomes are in your cells?
a)
23
b)
19
c)
12
d)
10
86.
A karyotype is a visual image of chromosomes, like the image here.
a)
True
b)
False
87.
Which gender can be carriers of colorblindness and not have it?
a)
Just males
b)
Just females
c)
Both genders
88.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
89.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
90.
A child is born with blood type O. All of the following could be the blood type of the parents except.
a)
A and B
b)
A and A
c)
A and O
d)
AB and O
91.
In one strain of mice, fur color ranges from white to darkest brown with every shade of brown in between. This pattern of inheritance for fur color is most likely controlled by
a)
polygenic
b)
codominance
c)
pleiotropy
d)
incomplete dominance
92.
What inheritance pattern is shown by the pedigree?
a)
autosomal recessive, autosomal dominant, sex-linked dominant, sex-linked recessive
b)
autosomal recessive, sex-linked recessive
c)
sex-linked dominant, autosomal recessive, autosomal dominant
d)
sex-linked recessive, autosomal recessive, autosomal dominant
93.
What is the likely inheritance pattern of the pedigree shown?
a)
autosomal recessive
b)
autosomal recessive or sex-linked recessive
c)
autosomal dominant
d)
autosomal dominant or sex-linked dominant
94.
Genetic engineering has been used to produce
a)
medicines.
b)
food animals.
c)
improved crops.
d)
all of these.
95.
Breeders can increase the genetic variation in a population by using
a)
inbreeding.
b)
mutations.
c)
hybridization.
d)
restriction enzymes.
96.
Which produces offspring from a single cell of an adult?
a)
inbreeding.
b)
mutations.
c)
hybridization.
d)
cloning.
97.
Any change or mistake in DNA replication can cause a ________
a)
cancer cell
b)
virus
c)
disease
d)
mutation
98.
In a pedigree chart, how are males illustrated
a)
circles
b)
squares
c)
triangles
d)
lines
99.
In a pedigree chart, how are relations illustrated
a)
circles
b)
squares
c)
shading
d)
lines
100.
In a pedigree chart, how are characterisitcs or traits illustrated
a)
circles
b)
squares
c)
shading
d)
lines
101.
In humans, what would the blood type of a child be if she inherited type A from Dad and type B from Mom?
a)
O
b)
A
c)
B
d)
AB
102.
True or False: Cloning humans is a federally accepted practice in the United States.
a)
True
b)
False
103.
True or false: Human tissues can be cloned in a Petri dish.
a)
True
b)
False
104.
Who was the first adult mammal successfully cloned?
a)
Dolly the Sheep
b)
Copy Cat the Cat
c)
Donald Trump the Donald
d)
Agouti Gout the Mouse
105.
True or false: Identical twins are genetic clones
a)
True
b)
False
106.
Which of the following is NOT an argument in favor of GMOs?
a)
Reduction in biodiversity
b)
Disease resistant crops
c)
Food with extra nutrients
d)
Controlled production of insulin
107.
What is the SCIENTIFIC purpose for inserting genes for gfp or rfp into an organism?
a)
They act as tracers for genes that aren't obvious
b)
They look stinking cool
c)
They provide disease resistance
d)
They make animals more marketable as pets
108.
What is a GMO?
a)
An organism with foreign DNA
b)
An organism missing genes
c)
Epigenetics
d)
A genetically identical organism
109.
What is genetic engineering?
a)
Manipulation/addition of genes
b)
Naturally breeding two animals with desired traits
c)
Cross-pollinating two crops
d)
Harvesting stem cells
110.
Glowing cats that contain jellyfish biolumenesence genes inserted into their DNA are an example of?
a)
neon dye
b)
transgenics
c)
cloning
d)
gene therapy
111.
The process of making changes in the DNA code of a living organism is called
a)
selective breeding
b)
genetic engineering
c)
inbreeding
d)
hybridization
112.
Which technique would most likely be used by forensic scientists?
a)
Cloning
b)
Gene Therapy
c)
DNA Fingerprinting
d)
Karyotyping
113.
Which of these would NOT be a case of GM (genetic modification)?
a)
Cloning a mammoth
b)
Golden rice
c)
Square watermelons
d)
Glowing tobacco plant
114.
A cell that has not yet differentiated into a specialized cell
a)
germ cell
b)
somatic cell
c)
stem cell
d)
gamete
115.
Which term refers to a farmer choosing the best corn from this year to plant next year?
a)
natural selection
b)
selective breeding
c)
genetic engineering
d)
genetic transformation
116.
Making changes in the DNA of an organism is
a)
selective breeding
b)
artificial selection
c)
genetic engineering
d)
genetic transformation
117.
The purpose of selective breeding is to
a)
Get bigger animals
b)
get smaller animals
c)
create animals with desirable traits
d)
create animals with bad traits
118.
Problems with selective breeding include
a)
Better animals
b)
More Meat
c)
Animals can have bad health problems
d)
more diversity
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