WorksheetsIntro to Genetics
Total questions: 101
Worksheet time: 2hrs 2mins
Name
Class
Date
1.
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)
2.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
3.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
4.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
5.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
6.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
7.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
8.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
9.
B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
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
10.
AA and Aa always show up as
a)
dominant
b)
recessive
11.
aa always shows up as
a)
dominant
b)
recessive
12.
aa always shows up as
a)
dominant
b)
recessive
13.
Aa is
a)
homozygous
b)
heterozygous
14.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
15.
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
16.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
17.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
18.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
19.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
20.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
21.
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
22.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
23.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
24.
In a punnet square where are the parent alleles written?
a)
Top and inside the boxes
b)
Only on the left and right side of the boxes.
c)
outside of the boxes (top and left side)
d)
All on the top side of the boxes
25.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
26.
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
27.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
28.
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
29.
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
30.
If you have a male with large wings (DD) and a female with small wings (dd). What allele stands for large wings?
a)
D
b)
d
c)
Dd
d)
dd
31.
A tall plant (TT) is crossed with a tall plant (Tt). What is the genotype?
a)
2 TT: 2 Tt: 0 tt
b)
1 TT: 2 Tt: 1 tt
c)
2 TT: 1 Tt: 1 tt
d)
0 TT: 0 Tt: 4 tt
32.
A green pea plant (GG) is being crossed with a green pea plant (Gg). What is the phenotype?
a)
100 % rainbow
b)
50% yellow and 50% green
c)
100% green
d)
100% yellow
33.
A red flower (Rr) is crossed with a white flower (rr). What is the genotype?
a)
0 RR; 0 Rr: 4 rr
b)
2 RR; 0 Rr: 2 rr
c)
4 RR; 0 Rr: 0 rr
d)
0 RR; 2 Rr: 2 rr
34.
Two heterozygous red flower (white flowers are recessive) are crossed. What is the phenotype?
a)
75% red and 25% white
b)
25% red and 75% white
c)
100 White
d)
50% red 50% red
35.
A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color).
a)
100 % tan
b)
100 % brown
c)
50 % brown and 50% tan
d)
75 % brown and 25 % tan
36.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
37.
What do we use pedigrees for?
a)
To look at families
b)
To make determinations about the offspring
c)
To track traits in families
d)
Nothing
38.
How many individuals are there in the 3rd generation?
a)
2
b)
3
c)
4
d)
6
39.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
40.
Give the genotype for person II-1
a)
GG
b)
Gg
c)
gg
41.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
42.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
43.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
44.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
45.
What blood type would an individual have if this was one of the cells seen under a microscope?
a)
Type A
b)
Type B
c)
Type AB
d)
Type O
46.
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
47.
Which term(s) best describes the inheritance of human blood types?
a)
incomplete dominance and multiple alleles
b)
codominance and epistasis
c)
codominance and multiple alleles
d)
incomplete dominance and codominance
48.
What pattern of inheritance is shown in this image?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
49.
What pattern of inheritance is shown in this image?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
50.
What do you call the non-Mendelian inheritance pattern where both traits are dominant and both appear in the organism with heterozygous genotype?
a)
Codominance
b)
Incomplete dominance
c)
Polygenic traits
51.
What is the phenotype of a person with the genotype AO?
a)
type A
b)
type O
c)
AA
d)
OO
52.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have?
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
53.
What is the genotype of a person with type A blood, who had a father with type O blood?
a)
AB
b)
AO
c)
AA
d)
OO
54.
What is NOT a possible genotype for someone with type B blood?
a)
BB
b)
AB
c)
BO
55.
incomplete dominance means that there traits are,,,
a)
expressed equally
b)
dominant
c)
recessive
d)
blended
56.
blood types consist of 4 different alleles.
a)
false
b)
true
57.
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%
58.
In a certain species of animal, black fur (B) is dominant over tan fur (b).
Which type of dominance does this cross show?
Which type of dominance does this cross show?
a)
Complete Dominance
b)
Incomplete Dominance
c)
Codominance
d)
Polygenic Inheritance
59.
What type of inheritance do two alleles have if their traits blend together?
a)
Incomplete Dominance
b)
Co-Dominance
c)
Mendelian Inheritance
d)
Homozygous Inheritance
60.
This type of inheritance pattern shows BOTH traits in possible offspring.
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
61.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
62.
Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr?
a)
Red
b)
Red and White
c)
White
d)
Pink
63.
How many PAIRS of sex chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
64.
If a woman has type A blood and her child has type O blood, the father must have which of the following blood types?
a)
A, B, or O
b)
A or O
c)
AB or B
d)
O only
65.
What are the blood types of the possible children that a woman (type O) and man (type AB) can have? Use a Punnett square if you need to.
a)
O and AB
b)
O and A
c)
O and B
d)
A and B
66.
X-linked conditions are more common in men than in women because
a)
The genes associated with the X linked conditions are linked to the X chromosome, which determines maleness.
b)
Men need to inherit only one copy of the recessive allele for the condition to be fully expressed
c)
Women simply do not develop the disease regardless of their genetic composition
d)
The sex chromosomes are more active in men than in women
67.
Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder?
a)
Chromosome pair 5
b)
sex chromosomes
c)
Chromosome pair 21
d)
There are no chromosomal disorders
68.
Which sex chromosomes would indicate a typical human male?
a)
XX
b)
X
c)
XY
d)
XXY
69.
Photograph of chromosomes grouped in ordered pairs is called a
a)
pedigree
b)
Punnett Square
c)
Venn Diagram
d)
Karyotype
70.
Dr. Smith's parents have normal hearing. However, Dr. Smith has inherited a form of deafness. Deafness is a recessive trait that is associated with the abnormal allele (d). The allele associated with normal hearing is (D). Dr. Smith's parents could have which of the following genotypes?
a)
DD and dd
b)
dd and dd
c)
Dd and Dd
d)
DD and DD
71.
A tall plant (TT) is crossed with a short plant (SS) and a medium plant (TS) results. This is what type of inheritance pattern?
a)
Incomplete Dominance
b)
Codominance
c)
Complete dominance
72.
Mom has Type A blood (Genotype AA). Dad has Type B blood (Genotype BB). What possible blood types (phenotype) can the children have?
a)
Type A only
b)
Type B only
c)
Type AB only
d)
Type A or Type B or Type AB
73.
How many people in the pedigree are carriers for the disorder?
a)
6
b)
8
c)
2
d)
9
74.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
75.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
76.
A roan cow shows co-dominance in fur color (orange and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?
a)
4: Orange and White
b)
1: Orange : 1 White
c)
2 Orange: 2 Orange and White: 0 White
d)
1: Orange: 2 Orange and White: 1 White
77.
In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).
What is the genotype ratio for a cross between a grey fowl and a white fowl?
What is the genotype ratio for a cross between a grey fowl and a white fowl?
a)
2 BB: 2 Bb: 0 bb
b)
0 BB: 4 Bb: 0 bb
c)
0 BB: 2 Bb: 2 b
d)
1 BB: 2 Bb: 1 bb
78.
In fruit flies, eye color is a sex linked trait. Red is dominant to white. What would be the percentages of offspring of a cross of a white eyed female with a red-eyed male?
a)
1 female white eyes, 1 female red-eyes, 1 male white eyes, 1 male red-eyes
b)
2 female red eyes, 2 males white eyes
c)
2 female white eyes, 2 males red eyes
d)
2 female red eyes, 1 male red eyes, 1 male white eyes
79.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
80.
How many PAIRS of chromosomes do humans have?
a)
23
b)
46
c)
1
d)
2
81.
What gender is this individual?
a)
male
b)
female
c)
we cannot tell using a karyotype?
82.
Hemophilia is a x-linked disorder. A woman is a carrier for the disorder. Which is the correct genotype?
a)
Hh
b)
XHXh
c)
hh
d)
XhXh
83.
Hemophilia is a x linked trait. A normal man marries a woman that is a carrier. What are their chances of having a child with the disorder?
a)
O%
b)
50%
c)
25%
d)
100%
84.
What is the chromosomal condition of the individual whose karyotype is seen in the image?
a)
Trisomy 21 (Down's Syndrome)
b)
Trisomy 13 (Patau Syndrome)
c)
Trisomy 18 (Edward's Syndrome)
d)
XXY Sex Chromosomes (Klinefelter's Syndrome)
85.
Based on the Karyotype shown, at which chromosome pair can we identify a genetic disorder?
a)
Chromosome pair 5
b)
sex chromosomes
c)
Chromosome pair 21
d)
There are no chromosomal disorders
86.
What is the gender of the individual whose karyotype is seen in the image?
a)
Male
b)
Female
87.
In a dihybrid cross
a)
one trait is crossed.
b)
two traits are crossed.
c)
four boxes are needed for the punnett square.
d)
mom's alleles are dominant.
88.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9/16
b)
2/16
c)
3/16
d)
6/16
89.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
90.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
91.
A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.
This cross would be
a)
BBEE x bbee
b)
BBEe x BbEe
c)
BbEE x BbEe
d)
BBee x BBEE
92.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
93.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
94.
In a dihybrid cross
a)
one trait is crossed.
b)
two traits are crossed.
c)
four boxes are needed for the punnett square.
d)
mom's alleles are dominant.
95.
Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
96.
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%
97.
Based off this punnett square, what fraction of the offspring will have wrinkled, green seeds?
a)
9/16
b)
3/16
c)
1/16
d)
16/16
98.
What is the genotype for a pea plant homozygous for round seeds (R), and heterozygous for yellow seeds?
a)
RrYy
b)
RRyy
c)
RRYy
d)
rryy
99.
A white mouse with red eyes is crossed with a black mouse with brown eyes. The white mouse is recessive for both of its traits. The black mouse is dominant for both of its traits.
This cross would be
a)
BBEE x bbee
b)
BBEe x BbEe
c)
BbEE x BbEe
d)
BBee x BBEE
100.
What would be the gametes for the yyrr plant?
a)
yR, yr, Yr, YR
b)
yy, yy, yy, yy
c)
yr, yr, yr, yr
d)
YR, YR, YR, YR
101.
What would be the gametes for the YyRr plant?
a)
YR, YR, yR, yR
b)
YR, Yr, yR, yr
c)
Yy, Rr, YY, RR
d)
yy, rr, yy, rr
100 %
