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Heredity Unit Test Review

Total questions: 45

Worksheet time: 1hrs 4mins

Name
Class
Date
1.
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%
2.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
3.
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%
4.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
5.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
6.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
7.
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 
8.
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 
9.

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

a)

25%

b)

50%

c)

75%

d)

100%

10.
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%
11.
In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?
a)
0%
b)
25%
c)
50%
d)
75%
12.
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
13.
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 
14.
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%
15.

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

a)

25%

b)

50%

c)

75%

d)

100%

16.
If you have a parent who has GgBb as their genotype, what are the possible alleles they could donate to their gametes?
a)
GB, Gb, gB, gb
b)
GB, GB, gb, gb
c)
Gb, Gb, Gb, GB
d)
GG, BB, gg, bb
17.
How many offspring will you have in a dihybrid cross? 
a)
4
b)
8
c)
16
d)
5
18.
T4 - What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
19.
T4 - 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
20.
Assume dad's gametes are on top, what is his genotype?
a)
AAPP
b)
AaPp
c)
aaPP
d)
Aapp
21.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
22.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
23.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
24.
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
25.
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.
26.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
27.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
28.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
29.

In this pedigree, which gender can be carriers of colorblindness and not have it?

a)

Just males

b)

Just females

c)

Both genders

30.
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
31.
If a trait SKIPS a generation, it is an indication that the trait is....
a)
dominant
b)
recessive
c)
incompletely dominant
d)
co-dominant
32.
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
33.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
34.

The study of heredity is called ....

a)

biology

b)

genetics

c)

chemistry

35.

The physical expression of a trait is called the ...

a)

genotype

b)

phenotype

36.

Genotype: TT

a)

homozygous dominant

b)

homozygous recessive

c)

heterozygous dominant

37.

Which statement below describes DOMINANT alleles?

a)

expressed when at least one is present

b)

only expressed when 2 are present

38.

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

39.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
40.

What type of inheritance pattern is shown here?

a)

Codominance

b)

Incomplete dominance

41.

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

42.

The green fish offspring in this image is an example of ---

a)

Incomplete dominance

b)

Codominance

43.

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

44.

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

45.

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

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