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WorksheetsGenetics
Total questions: 73
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
A heterozygous white rabbit is crossed with a homozygous black rabbit. White(W) is dominant to black(w). List the genotypes and phenotypes of the offspring.
a)
genotype-25% heterozygous; 75% homozygous recessive and phenotype-50% white and 50% black
b)
genotype- 50% heterozygous(Ww); 50% homozygous recessive(ww) and phenotype- 50% white and 50% black
2.
What type of pollination occurs when both male and female gametes come from the same plant?
a)
fertilization
b)
self pollination
c)
cross pollination
d)
pollen tube
3.
What type of plant did Gregor Mendel study?
a)
corn
b)
tomato
c)
okra
d)
pea
4.
What is the only genotype you can know by looking at the phenotype?
a)
homozygous recessive
b)
homozygous dominant
c)
heterozygous recessive
d)
heterozygous dominant
5.
Which of the following alleles are homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
6.
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%
7.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
8.
Aa is
a)
homozygous (pure)
b)
heterozygous (hybrid)
c)
homozygous (hybrid)
d)
heterozygous (pure)
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.
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%
11.
Evan is a tall, 12 year old boy. He has a scar on his right cheek. He is intelligent and an excellent drummer. Which of his traits did he most likely inherit?
a)
height
b)
the scar
c)
his intelligence
d)
ability to play drums
12.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
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.
T = tall and t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
15.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
16.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
17.
The scientific study of heredity is ____.
a)
Genetics
b)
Punnett squares
c)
Inheritance
d)
Biology
18.
If one stronger trait "covers" up another weaker trait, the trait that covers the other is said to be:
a)
Dominant
b)
Heterozygous
c)
Recessive
d)
Hidden
19.
Some traits are inherited (get from genes), some traits are acquired (learned from others).
Language is an
a)
inherited trait
b)
acquired trait
20.
Some traits are inherited (get from genes), some traits are acquired (learned).
tongue rolling is
a)
inherited trait
b)
acquired trait
21.
Red eyes(R) are dominant to white eyes(r). Two mice heterozygous for red eyes mate. What is the expected genotypic ratio of their offspring?
a)
1 RR: 1 Rr: 1 rr
b)
0 RR: 4 Rr: 0 rr
c)
1 RR: 2 Rr: 1 rr
d)
1 RR: 1 Rr
22.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall(T) sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
23.
Which statement describes how two organisms may show the same trait, yet have different genotypes for that phenotype?
a)
Both are homozygous for the dominant trait.
b)
One is homozygous dominant, and the other homozygous recessive.
c)
Both are heterozygous for the dominant trait.
d)
One is homozygous dominant and the other heterozygous.
24.
Which of the following alleles is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
25.
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
26.
A green pea plant (Gg) is crossed with a yellow pea plant (gg). Describe the genotype of the offspring.
a)
50% heterozygous and 25% homozygous recessive
b)
50% heterozygous and 50% homozygous recessive
c)
100% homozygous recessive
d)
25% heterozygous and 50% homozygous
27.
A homozygous tall plant is crossed with a heterozygous tall plant. What is the phenotype of the offspring? Tall is dominant to short.
a)
50% homozygous dominant; 50% heterozygous; 100% tall
b)
100% homozygous dominant; 100% tall
c)
25% homozygous dominant; 75% heterozygous; 100% short
d)
50% homozygous dominant; 50% heterozygous; 100% short
28.
A white flower is crossed with a white flower. What is the genotype of the offspring? Purple flowers are dominant to white.
a)
100% homozygous dominant
b)
100% heterozygous dominant
c)
100% homozygous recessive
d)
100% heterozygous recessive
29.
A homozygous black chicken is crossed with a homozygous black chicken. What is the genotype and phenotype of the offspring? Black is dominant to white.
a)
100% heterozygous; 50% black
b)
100% homozygous dominant; 100% black
c)
100% homozygous recessive; 100% black
d)
100% homozygous recessive; 50 % black
30.
Two heterozygous white (brown fur is recessive) rabbits are crossed. What is their genotype?
a)
25% homozygous dominant; 25% homozygous recessive; 50% heterozygous
b)
50% homozygous dominant; 50% heterozygous
c)
25% homozygous dominant; 75% homozygous recessive
31.
Two heterozygous white(brown fur is recessive) rabbits are crossed. What is the phenotype of the offspring?
a)
75% white; 25% brown
b)
25% white; 75 % brown
32.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous or purebred
b)
heterozygous or hybrid
c)
twin offspring
d)
pairs of chromosomes
33.
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
34.
Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (R'R')? What color are flowers that are RR'?
a)
Red
b)
Red and White
c)
White
d)
Pink
35.
In Andalusian fowls, black individuals (BB) and white individuals (B'B') 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 B'B'
b)
0 BB: 4 BB': 0 B'B'
c)
0 BB: 2 BB': 2 B'B'
d)
1 BB: 2 BB': 1 B'B'
36.
In Andalusian fowls, black individuals (BB) and white individuals (B'B') are homozygous. Heterozygous individuals are grey (BB').
Cross a black fowl with a white fowl. What is the phenotype ratio?
Cross a black fowl with a white fowl. What is the phenotype ratio?
a)
4 black: 0 grey: 0 white
b)
2 black: 2 grey: 0 white
c)
0 black: 4 grey: 0 white
d)
0 black: 2 grey: 2 white
37.
In some carnations, flower color exhibits codominance. Identify the correct genotypes for red, white, and speckled carnations.
a)
Red = RR, white = rr, speckled = Rr
b)
Red = RR, white = WW, speckled = rw
c)
Red = RR, white = ww, Speckled = Rw
d)
Red = RR, white = WW, speckled = RW
38.
In some carnations, flower color exhibits codominance. When crossed, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.
a)
2 red: 2 speckled: 0 white
b)
4 red: 0 speckled: 0 white
c)
0 red: 4 speckled: 0 white
d)
0 red: 2 speckled: 2 white
39.
polygenic means that _________ control a characteristic
a)
many genes
b)
single genes
c)
3 genes
d)
no genes
40.
What is NOT a possible genotype for someone with type B blood?
a)
BB
b)
AB
c)
BO
d)
IBi
41.
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
42.
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
43.
Which blood type is the universal donor (all people can receive it)?
a)
O
b)
AB
c)
A
d)
B
44.
Which blood type is the universal recipient (a person with this blood type can get blood from any other type)?
a)
O
b)
AB
c)
A
d)
B
45.
A woman has type B blood and her husband has type O blood. What must be the woman's genotype, if they have a child with type O blood?
a)
BO
b)
BB
c)
OO
d)
type B
46.
Would a person with type B blood be able to receive type AB blood from a transfusion?
a)
yes, because they both have the B antigen
b)
yes, because the person has B antibodies
c)
no, because the person has A antibodies
d)
no, because the person has B antibodies
47.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
48.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
49.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
50.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
51.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
52.
What has happened to individuals in this pedigree with a diagonal line through them?
a)
They have divorced.
b)
They have died.
c)
They have moved.
d)
They do not want their genes considered.
53.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
54.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
55.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XrY
a)
female red
b)
female white
c)
male red
d)
male white
56.
In fruit flies eye color is carried on the X chromosome. RED is dominant to WHITE. What is the sex and color of the following: XRXR
a)
female red
b)
female white
c)
male red
d)
male white
57.
In humans, skin tone is caused by 3 genes, each with 2 alleles. This is an example of
a)
codominance
b)
incomplete dominance
c)
polygenic inheritance
d)
multiple alleles
58.
Colorblindness is a recessive, X chromosome sex-link disorder. Cross a normal carrier female with a colorblind male. What percent of the male children will be colorblind?
a)
25%
b)
0%
c)
75%
d)
50%
59.
Hemophelia is less common in females and more common in males because
a)
males only inherit one X chromosome so they either have the disease or they don't
b)
girls are awesome
c)
boys inherit the X chromosome from their fathers
d)
girls inherit the
Y chromosome from their fathers
Y chromosome from their fathers
60.
Eye color is an sex-linked gene in fruit flies. Red eyes (R) are dominant to white eyes (r). A red eyed male is crossed with a white eyed female. What are the the results of the offspring?
a)
all females red eyed, all males white eyed
b)
all males red eyes, all females white eyed
c)
50% red, 50% white
d)
50% male, 50% female
61.
Why do you perform a test cross?
a)
to find the unknown phenotype of an organism
b)
to find the offspring of known parents
c)
to find the unknown genotype of an organism
d)
to find the intersection
62.
What organism do you use to do a test cross?
a)
homozygous recessive
b)
homozygous dominant
c)
heterozygous
d)
incomplete recessive
63.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Codominance
c)
Independent assortment
d)
Recessive inheritance
64.
Which individual below would have more of a trait that followed the pattern of polygenic inheritance?
a)
AaBbCcDdEe
b)
AAbbCcDdEe
c)
AaBBCcDDEe
d)
aaBbCCDdEE
65.
What is another name indicating the genetic cause for Down Syndrome?
a)
Trisomy 47
b)
Trisomy 46
c)
Trisomy 21
d)
Trisomy 23
66.
Four alleles determine the fur color patterns in rabbits. They are represented by C, cch, ch, and c. This is an example of _______________________.
a)
polygenic traits
b)
multiple alleles
c)
codominance
d)
incomplete dominance
67.
Determine the sex of the individual whose karyotype is displayed in the image.
a)
female
b)
male
68.
A pair of identical chromosomes shown in a karyotype, one inherited from mom, and one inherited from dad are called
a)
sister chromotids
b)
centromeres
c)
homologous chromosomes
d)
autosomes
69.
Down's syndrome occurs because of a(n)
a)
missing sex chromosome
b)
extra sex chromosome
c)
additional 21st chromosome
d)
additional 18th chromosome
70.
Klinefelter's Syndrome has the karyotype notation of
a)
47XX+21
b)
47XXY
c)
45XO
d)
44XX
71.
How many chromosomes are shown in a normal human karyotype?
a)
2
b)
12
c)
25
d)
46
72.
By looking at this karyotype you can determine that this person ______ ________.
a)
has Downs Syndrome
b)
has Monosomy X (Turners Syndrome)
c)
is normal
d)
has Trisomy 13(Patau Syndrome)
73.
SELECT ALL THAT APPLY:
a)
Male
b)
Female
c)
No chromosomal abnormalities
d)
Trisomy 21
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