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WorksheetsChapter 8 genetics
Total questions: 127
Worksheet time: 3hrs 48mins
Name
Class
Date
1.
What is the genotype?
a)
letters that represent a trait
b)
black hair
c)
blonde hair
d)
blue hair
2.
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
3.
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
4.
Having two identical alleles for a given trait, either both dominant or both recessive
a)
Homozygous
b)
Selective Breeding
c)
Mutation
d)
Carrier
5.
R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?
a)
offspring will be Rr
b)
offspring will be RR
c)
round seeds will be recessive to wrinkled
d)
Wrinkled will be observed in half of offspring
6.
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
7.
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
8.
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
9.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
10.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
11.
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%
12.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
13.
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
14.
What is the percentage of offspring that have green pods?
a)
100%
b)
75%
c)
50%
d)
25%
15.
An organism’s physical appearance, or visible traits
a)
Recessive
b)
Genotype
c)
Phenotype
d)
Heterozygous
16.
Where, in the eukaryotic cell, is DNA located?
a)
ribosomes
b)
nucleus
c)
E.R.
d)
cytoplasm
17.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
18.
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
19.
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
20.
Which of the following genotypes is homozygous recessive?
a)
RR
b)
Rr
c)
rr
d)
None of the Above
21.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
22.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
23.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
24.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
25.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
26.
Which characteristic 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
27.
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
28.
B - black, b - brown. Two black mice mate and have some black and some brown mice. What is the genotype of the parents?
a)
BB x Bb
b)
BB x bb
c)
Bb x Bb
d)
Bb x bb
29.
What are personal characteristics called that have been passed on to offspring from parents, such as dimples or eye color?
a)
recessive traits
b)
genetics
c)
inherited traits
d)
gene
30.
Pairs of genes that control the same trait are known as
a)
allelles
b)
gametes
c)
hybrids
d)
loci
31.
In screech owls, red feathers are dominant over gray feathers. If two heterozygous red-feathered owls are mated, what percentage of their offspring would be expected to have red feathers?
a)
25%
b)
50%
c)
75%
d)
100%
32.
An organism’s genetic makeup, or allele combinations
a)
Recessive
b)
Genotype
c)
Phenotype
d)
Heterozygous
33.
Having two different alleles for a given trait, usually one dominant and one recessive
a)
Recessive
b)
Genotype
c)
Phenotype
d)
Heterozygous
34.
An allele whose trait always shows up in the organism when the allele is present
a)
Gene
b)
Pedigree
c)
Punnett Square
d)
Dominant
35.
Which of the following always pairs with G in DNA?
a)
C
b)
G
c)
A
d)
T
36.
Which of the following always pairs with A in DNA?
a)
T
b)
C
c)
G
d)
A
37.
Scientific study of how traits are passed to offspring through genes
a)
Heredity
b)
Genetics
c)
Inheritance
d)
Allele
38.
What is the possibility of a bb child when you cross a BB with a Bb parent?
a)
100%
b)
75%
c)
50%
d)
0%
39.
What is the possibility of a bb child when you cross a Bb with a Bb parent?
a)
100%
b)
75%
c)
50%
d)
25%
40.
The nitrogen base adenine is always paired with the nitrogen base ____________.
a)
cytosine
b)
guanine
c)
thymine
d)
nitrogen
41.
Which of the following is the location of chromosomes ?
a)
mitochondria
b)
nucleus
c)
ribosomes
42.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
43.
Which of the following is the complement of DNA to: AATCCG
a)
TTAGGC
b)
UUAGGC
c)
UUTCCG
d)
A - C - G
44.
What is a phenotype?
a)
The expression of a trait; physical appearance.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
45.
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
46.
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%
47.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
48.
The nitrogen base guanine is always paired up with the nitrogen base ________________.
a)
thymine
b)
guanine
c)
cytosine
d)
adenine
49.
If the dominant allele (B) represents brown hair and the recessive allele (b) represents blonde hair, which offspring represents a homozygous recessive genotype?
a)
BB
b)
Bb
c)
blonde
d)
bb
50.
What part of our cells holds our DNA?
a)
cytoplasm
b)
cell membrane
c)
nucleus
d)
ribosomes
51.
The dominant trait is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
52.
A cell is...
a)
something we study in science class
b)
Not important
c)
a multicellular object
d)
the basic unit of life
53.
specific portions of DNA that determine hereditary characteristics .
a)
Genotype
b)
Gene
c)
Phenotype
54.
If an individual inherits one dominant allele and one recessive allele what is the genotype
a)
Homozygous, GG
b)
Heterozygous, gg
c)
Homozygous, Gg
d)
Heterozygous, Gg
55.
What characteristic would a child not inherit from parents?
a)
freckles
b)
eye color
c)
hair style
d)
dimples
56.
What is the scientific study of heredity called?
a)
Geneology
b)
Selective Breeding
c)
Genetics
d)
Heredity
57.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
58.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
59.
having two different alleles for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
60.
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
61.
Which characteristic is NOT inherited?
a)
Hairline (straight or widow's peak)
b)
Spoken language (English, Spanish, etc...)
c)
Earlobes (attached or detached)
d)
Hair type (straight or curly)
62.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
63.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
64.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
65.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
66.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
67.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
68.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
69.
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
70.
How are individuals I-2 and III-5 related?
a)
Grandpa and grandson
b)
Mom and son
c)
Uncle and nephew
d)
Grandma and grandson
71.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
72.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
73.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
74.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
75.
An allele whose trait always shows up in the organism when the allele is present.
a)
recessive allele
b)
dominant allele
c)
hidden allele
d)
present allele
76.
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
77.
one set of instructions for an inherited trait
a)
heredity
b)
allele
c)
trait
d)
gene
78.
one of the alternative forms of a gene that governs a characteristic, such as hair color
a)
allele
b)
gene
c)
trait
d)
DNA
79.
an organism's appearance or other detectable characteristic
a)
genotype
b)
phenotype
c)
genetics
d)
heterozygous
80.
genetic makeup
a)
phenotype
b)
genotype
c)
heterzygous
d)
allele
81.
the chances of something happening
a)
dominant
b)
genotype
c)
phenotype
d)
probability
82.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
83.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
84.
father of genetics
a)
Gregor Mendel
b)
James Watson
c)
Dr. Robbins
d)
Francis Crick
85.
Complex molecules which make up structures and carry out functions of an organism
a)
protein
b)
chromosome
c)
DNA
d)
gene
86.
A single piece of coiled DNA found in the cells; contains genes that encode traits.
a)
gene
b)
chromosome
c)
trait
d)
DNA
87.
A characteristic that an organism can pass on to its offspring through its genes
a)
protein
b)
trait
c)
DNA
d)
gene
88.
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)
89.
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
90.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
91.
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
92.
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
93.
An offspring will receive how many alleles from each parent to determine a specific trait?
a)
one
b)
two
c)
three
d)
five
94.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
95.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
96.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
97.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
98.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
99.
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
100.
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%
101.
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
102.
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
103.
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
104.
Which answer best describes codominant alleles?
a)
Both are equally dominant
b)
Both are equally recessive
c)
Neither are dominant or recessive
105.
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%
106.
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
107.
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
108.
This is an example of what?
a)
Complete dominance
b)
Incomplete dominance
c)
Codominance
d)
None of the above
109.
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
110.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
111.
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%
112.
A heterozygous yellow pea plant's genotype would be:
a)
YY
b)
yy
c)
Yy
d)
Yg
113.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
114.
The inherited combination of alleles is known as the offspring's
a)
heredity
b)
phenotype
c)
genotype
d)
redigree
115.
An organism's appearance is known as its
a)
heredity
b)
phenotype
c)
genotype
d)
pedigree
116.
What is the study of how traits are passed from parents to offspring?
a)
heredity
b)
DNA
c)
genotype
d)
genetics
117.
What did Mendel use for his experiments?
a)
rats
b)
carrots
c)
succulents
d)
pea plants
118.
An uppercase letter represents what type of trait
a)
dominant
b)
recessive
c)
blending
d)
masking
119.
A lowercase letter represents what type of trait
a)
dominant
b)
recessive
c)
blending
d)
masking
120.
What holds "the code" that determines your phenotype?
a)
genotype
b)
genetics
c)
heredity
d)
allele
121.
How many alleles do we have for each trait?
a)
1
b)
2
c)
3
d)
4
122.
Select the homozygous recessive genotype
a)
AA
b)
aa
c)
Aa
123.
Select the homozygous dominant genotype
a)
AA
b)
aa
c)
Aa
124.
Select the heterozygous genotype
a)
AA
b)
aa
c)
Aa
125.
If an animal has a homozygous recessive genotype, which trait would be expressed?
a)
recessive trait
b)
dominant trait
126.
If an animal has a homozygous dominant genotype, which trait would be expressed?
a)
recessive trait
b)
dominant trait
127.
If an animal has a heterozygous genotype, which trait would be expressed?
a)
recessive trait
b)
dominant trait
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