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Worksheets

Genetics

Total questions: 85

Worksheet time: 2hrs 17mins

Name
Class
Date
1.
Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
2.
Colorblindness is a sex-linked recessive disorder. A normal woman whose father was colorblind marries a man with normal color vision. What percentage of their sons will be colorblind?
a)
0%
b)
25%
c)
50%
d)
100%
3.
Hemophilia is a sex-linked recessive disorder. A woman with hemophilia marries an unaffected man whose father had hemophilia. What percentage of their daughters will have hemophilia?
a)
0%
b)
25%
c)
50%
d)
100%
4.
Colorblindness is a sex-linked recessive disorder. If the daughter of a couple is colorblind, what are the two possible genotypes of her mother?
a)
XAXA and XAXa
b)
XAXA and XaXa
c)
XAXa and XaXa
d)
Cannot be determined
5.
If a trait shows up more commonly in men than women it is probably
a)
not inherited
b)
on the x chromosome and dominant
c)
on the x chromosome and recessive
d)
on a normal body chromosome
6.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
7.

Which of the following is NOT a sex-linked trait?

a)

Color-blindness

b)

Hemophilia

c)

Huntington disease

8.
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
9.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
10.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a male with normal vision?
a)
XNXN
b)
XnXn
c)
XNY
d)
XnY
11.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
12.
Vitamin D resistant rickets (deformed bone formation) is a sex-linked DOMINANT trait.  According to the Punnett square, what percentage of female offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
13.
Are recessive traits shown with capital or lowercase letters? 
a)
Capital
b)
Lowercase
14.
The physical appearance or the way a gene looks is known as it's....
a)
genotype
b)
allele
c)
gene
d)
phenotype
15.
The mathematical chance that something will happen is known as...
a)
chance
b)
luck
c)
probability
16.
Which is a true statements about this picture?
a)
Brown is recessive
b)
Brown is dominant
c)
Blue is dominant
d)
Blue is codominant
17.
What are the possible phenotypes in this punnett square?
a)
Bb, bb, BB
b)
purple, white
c)
Bb, bb
d)
light purple
18.

A mutation is harmful to an organism if it

a)

changes the phenotype of an organism

b)

changes the DNA segment

c)

reduces the organism's chance of survival

d)

makes the organism better able to avoid predators

19.

If a homozygous black cat (BB) is crossed with a homozygous white cat (bb), what is the probability of having a cat with white fur?

a)

100%

b)

0%

c)

75%

d)

25%

20.

A mother gives birth to a son, she then gives birth to a daughter. What is the likely hood that she will have another son?

a)

75%

b)

25%

c)

50%

d)

100%

21.

What pattern of inheritance is shown in this image?

a)

Codominance

b)

Incomplete dominance

c)

Sex-linked

d)

Polygenic

22.

A trait associated with a gene that is carried on the X or Y chromosome.

a)

sex linked

b)

polygenic

c)

multiple alleles

d)

codomiance

23.

Neither allele is dominant. Heterozygote has a blended phenotype.

a)

incomplete dominance

b)

codominance

c)

multiple alleles

d)

sex linked

24.

Do a Punnett Square.


A roan cow shows codominance in fur color (red and white). What is the phenotype ratio expected if a roan cow and a white cow reproduce?

a)

1 Red : 1 Roan

b)

1 White : 1 Roan

c)

1 Red : 1 White

d)

1: Red : 2 Red and White : 1 White

25.

A mule is the result of a cross between a donkey and a horse. A mule is a

a)

tetrad.

b)

phenotype.

c)

genotype

d)

hybrid.

26.

A tall plant (TT) is crossed with a short plant (tt). If the tall F1 (Tt) offspring pea plants are allowed to self-pollinate

a)

the offspring will be of medium height.

b)

all of the offspring will be tall.

c)

all of the offspring will be short

d)

the offspring can be tall or short.

27.

The principles of probability can be used to

a)

predict the traits of the off spring of genetic crosses.

b)

determine the actual outcomes of genetic crosses.

c)

determine which species should be used in genetic crosses.

d)

decide which organisms are best to use in genetic crosses.

28.

A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is

a)

25%

b)

50%

c)

75%

d)

100%

29.

If an organism’s diploid number is 12, its haploid number is

a)

12

b)

6

c)

24

d)

3

30.

Gametes are produced by the process of

a)

mitosis

b)

crossing over

c)

meiosis

d)

replication

31.

What is shown in the Figure

a)

independent assortment

b)

anaphase I of meiosis

c)

crossing-over

d)

replication

32.

What is formed at the end of meiosis?

a)

two genetically identical diploid cells

b)

four genetically different haploid cells

c)

four genetically identical diploid cells

d)

two genetically different haploid cells

33.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
34.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
35.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
36.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
37.
What does a horizontal line between a square and a circle mean?
a)
They are siblings
b)
They are cousins
c)
They are married ("together")
d)
They are the children
38.
How many boys did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
39.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
40.
How many girls in this family express this recessive disorder?
a)
4
b)
5
c)
6
d)
7
41.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
42.
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
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.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
45.
Give the genotype for person III-3.
a)
GG
b)
Gg
c)
gg
d)
we cannot be 100% sure of the genotype
46.
Give the genotype for person II-1, for this autosomal trait.
a)
GG
b)
Gg
c)
gg
d)
we cannot be 100% sure of the genotype
47.
What kind of trait is colorblindness if females can be carriers without having the disease?
a)
Regular trait
b)
Sex-linked trait
c)
Co-dominant trait
d)
Incomplete dominant trait
48.
If hemophilia is a sex-linked recessive trait, what genotype would individual III-3 have?
a)
XbX
b)
XbXb
c)
XbYb
d)
XbY
49.
If a trait SKIPS a generation, it is an indication that the trait is....
a)
dominant
b)
recessive
c)
incompletely dominant
d)
co-dominant
50.
If a trait is more likely to appear in one sex over the other......
a)
the trait is probably sex-linked.
b)
the trait is probably autosomal.
c)
the trait is probably co-dominant
d)
the trait if probably incompletely dominant
51.
If this pedigree shows an autosomal recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
52.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
53.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
54.

When one allele is not dominant over the other, resulting in both traits expressed in a heterozygous individual.....

a)

Incomplete Dominance

b)

Codominance

55.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a speckled flower. What is the phenotypic ratio?

a)

2 red, 2 speckled

b)

2 red, 2 blue

c)

2 blue, 2 speckled

56.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross two speckled flowers.

a)

1 red, 2 speckled, 1 blue

b)

2 red, 2 blue

c)

2 blue, 2 speckled

d)

1 red, 1 speckled, 2 blue

57.

Some flowers are controlled by codominance. Red flowers (RR), blue flowers (BB) and Speckled flowers (RB).


Cross a red flower with a blue flower.

a)

1 red, 2 speckled, 1 blue

b)

2 red, 2 blue

c)

4 speckled

d)

1 red, 1 speckled, 2 blue

58.

Radish color is completely dominant, red and white are pure breeding colors. While heterozygous are purple.


Cross a red radish with a white.

a)

4 purple

b)

1 red, 2 purple, 1 white

c)

2 red, 2 white

d)

1 red, 1 purple, 2 white

59.

In mice coat color is incompletely dominant. Black and white are homozygous. Brown mice are heterozygous.


What is the genotype for a brown mouse?

a)

BB

b)

Bb

c)

bb

60.

In cattle red coats are represented as RR, and white coats are represented as WW.


What is the genotype for Roan color?

a)

RR

b)

RW

c)

WW

61.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
62.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
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)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
64.
How many alleles does an individual have for each trait?
a)
1
b)
2
c)
3
d)
4
65.
The different forms of a gene are called
a)
traits
b)
pollinators
c)
alleles
d)
hybrids
66.
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
67.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
68.
In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between 2 speckled flowers and find the genotype ratio.
a)
0 RR: 4 RW: 0 WW
b)
2 RR: 2 RW: 0 WW
c)
1 RR: 2 RW: 1 WW
d)
0 RR: 2 RW: 2 WW
69.
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%
70.
This is an example of ___________.
a)
Incomplete Dominance
b)
Codominance
71.

A woman with curly hair and a man with straight hair produced a child with wavy hair:

a)

Incomplete dominance

b)

Codominance

c)

Complete dominance

72.
What gamete possibilities could come from this parent's genotype?
a)
AB, AB, aB, aB
b)
Ab, AB, Ab, ab
c)
Ab, Ab, Ab, Ab
d)
AB, aB, ab, aB
73.

What goes in box 3

a)

Aabb

b)

AABB

c)

AAbb

d)

aaBb

74.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
75.
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
76.
A male beetle has the genotype Ttbb. If this beetle mates with a female with genotype TTBb, what is the chance their offspring will have the genotype TtBb?
a)
3/16
b)
4/16
c)
8/16
d)
12/16
77.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
78.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
79.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
80.

This image is an example of a _____________ cross.

a)

Monohybrid

b)

Dihybrid

c)

Purebred

d)

Pure Breeding

81.
An organism’s genetic makeup, or allele combinations
a)
Recessive
b)
Genotype
c)
Phenotype
d)
Heterozygous
82.
Cross Two Homozygous plants
(RRYY x rryy)
R = round seeds, r  = wrinkled seeds Y = yellow seeds, y = green seeds
What percent will have Round and Yellow seeds? 
a)
0%
b)
25%
c)
50%
d)
100%
83.
What proportion of the offspring in Figure 11-4 would be expected to have white, smooth hair?
a)
9/16
b)
3/16
c)
4/16
d)
1/16
84.

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

85.

What percent of the parakeets from this cross look like the first parent in P1?

a)

7

b)

8

c)

9

d)

11

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