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Heredity

Total questions: 74

Worksheet time: 1hrs 9mins

Name
Class
Date
1.
Dominant or recessive?
tt
a)
Dominant 
b)
Recessive
2.
Dominant or recessive?
Dd
a)

Dominant

b)

recessive

3.
Which statement best supports why many offspring look similar to their parents?
a)
Offspring inherit characteristics from one parent.
b)
Offspring inherit characteristics from both parents.
c)
Parents choose which characteristics to pass on to their offspring.
d)
Parents choose to change their appearance to match that of their offspring.
4.
B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 
a)
0%
b)
25%
c)
50%
d)
75%
5.
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
6.
Homozygous or heterozygous?
BB
a)
Homozygous
b)
Heterozygous
7.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
8.

Which of the following is a Homozygous Dominant Genotype?

a)

Yy

b)

XX

c)

zz

9.

Which of the following is a heterozygous genotype?

a)

Gg

b)

UU

c)

pp

10.

Fill in the Yellow Box

a)

AA

b)

Aa

c)

aa

11.

Fill in the Yellow Box

a)

Bb

b)

BB

c)

bb

12.

What percentage of the offspring born from this cross will have a homozygous dominant genotype?

a)

25%

b)

50%

c)

75%

d)

100%

13.

The punnett square is used to tell the color of a frogs skin. "G" means green skin and "g" means brown skin. What is the chance the baby frogs will have brown skin?

a)

0%

b)

25%

c)

50%

d)

100%

14.

What is the father's genotype?

a)

DD

b)

Dd

c)

dd

15.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
b)
Tall = T
Short = t
c)
Tall = t
Short = T
d)
Tall = TT
Short = tt
16.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
17.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
18.

T - tall and t = short

In the punnett square below, what belongs in the missing square

a)

tt

b)

Tt

c)

Bb

d)

TT

19.

B = brown eyes

b = blue eyes

One brother has genotype BB and the other brother has genotype Bb.

Which statement is true about these two brothers?

a)

They have same phenotype and genotype

b)

They have different phenotypes and genotypes

c)

They have same phenotype, but different genotypes

d)

They have different phenotypes, but the same genotype

20.

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any white-flowering plant resulting from this species?

a)

rr

b)

rR

c)

RR

d)

Rr

21.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
22.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
23.
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 
24.

In mice, black fur (B) is dominant to white fur (b). According to the Punnett square shown, the offspring in box 4 would:

a)

be white.

b)

be heterozygous.

c)

be gray.

d)

be homozygous.

25.

In mice, black fur (B) is dominant to white fur (b). According to the Punnett square shown, how many offspring would be black?

a)

0

b)

1

c)

2

d)

3

e)

4

26.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
27.

How is the Punnett Square set up?

a)

Parents genotypes on the inside and offspring is on the outside

b)

The genotypes of each parent are on the sides and the offspring is in the boxes

c)

Grandparents genotypes on the sides and offspring in the box

28.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
29.

Who was Gregor Medel

a)

A scientist and priest who studies pea plant traits.

b)

The "father" of modern genetics.

c)

He discovered patterns of inheritance.

d)

All of the statements above are correct.

30.

In a pedigree, which shape represents a male?

a)

circle

b)

square

31.

Which gender has an X and a Y chromosome?

a)

male

b)

female

32.

On a pedigree, this symbol represents a ----

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

33.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

34.

How are individuals III-2 and II-4 related?

a)

Brother and sister

b)

Dad and daughter

c)

Uncle and niece

d)

Grandfather and granddaughter

35.

What is the mode of inheritance shown here?

a)

Recessive because it "skips" a generation

b)

Dominant because it shows up in every generation

36.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
37.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?

a)

male with white eyes

b)

female with red eyes

c)

male with red eyes

d)

female with white eyes

38.

In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?

a)

male with white eyes

b)

female with white eyes

c)

male with red eyes

d)

female with red eyes

39.

Colorblindness is a recessive X-linked disorder.

Which genotype represents a male with normal vision?

a)

XN YN

b)

Xn Yn

c)

XN Y

d)

Xn Y

40.
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
41.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
42.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
43.
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
44.
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
45.
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%
46.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
47.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
48.
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
49.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
50.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
51.

Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring represented in this P square will be calico (black and tan spotted)?

a)

25%

b)

50%

c)

75%

d)

100%

52.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?

a)

25

b)

50

c)

75

d)

100

53.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be white?

a)

25

b)

50

c)

0

d)

100

54.

Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be gray?

a)

25

b)

50

c)

75

d)

100

55.

What is the Genotype for Homozygous "B" allele

a)

IᴬIᴮ

b)

Iᴮi

c)

IᴬIᴬ

d)

IᴮIᴮ

56.

What is the Genotype for Heterozygous Type A Blood

a)

IᴬIᴮ

b)

Iᴬi

c)

IᴬIᴬ

d)

IᴮIᴮ

57.

What is the Genotype for Type 0

a)

IᴬIᴮ

b)

Iᴬi

c)

IᴬIᴬ

d)

ii

58.

Punnett Square: A man is homozygous for the B allele, and a woman is type O. What are ALL the possible blood types of their baby?

a)

IᴮIᴮ

b)

ii

c)

IᴬIᴬ

d)

Iᴮi

59.

Two parents think THEIR baby was switched at the hospital. Lulu (mom) has blood type A, and Caesar (dad) has blood type B. The baby has blood type AB. What is the mom's possible genotype? check all that apply

a)

Iᴬi

b)

IᴬIᴬ

c)

Iᴮi

d)

IᴮIᴮ

60.

Two parents think THEIR baby was switched at the hospital. Lulu (mom) has blood type A, and Caesar (dad) has blood type B. The baby has blood type AB. What is the Dad's possible genotype? check all that apply

a)

Iᴬi

b)

IᴬIᴬ

c)

Iᴮi

d)

IᴮIᴮ

61.

Two parents think THEIR baby was switched at the hospital. Lulu (mom) has blood type A, and Caesar (dad) has blood type B. The baby has blood type AB. Could the baby actually be theirs?

a)

No, because neither parent's genotype matches the baby

b)

No because the mom is only Type A

c)

Yes because both parents have type A and Type B

d)

Yes because if mom is A and dad is B - the baby could have genotype AB

62.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
63.

What goes in box 15

a)

aabb

b)

AABB

c)

aaBB

d)

AAbb

64.
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
65.
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.
66.

On a pedigree, this symbol represents a ---

a)

not affected female.

b)

not affected male.

c)

affected male.

d)

affected female.

67.

Which individual in the first generation is a carrier?

a)

I-1

b)

I-2

68.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
69.
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
70.
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
71.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
72.

Generation 2 individuals 5 and 6 are

a)

brother and sister.

b)

cousins.

c)

married.

d)

not related.

73.
What is the genotype of the father?
a)
AA
b)
aa
c)
Aa
d)
AA or aa
74.
What is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb

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