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Unit 6 Practice Test

Total questions: 71

Worksheet time: 3hrs 58mins

Name
Class
Date
1.
What is it called when a sperm and egg meet?
a)
meiosis
b)
fertilization
c)
cell division
d)
mitosis
2.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
3.
The chromosomes that pair up during meiosis, are called __________ chromosomes.  
a)
homozygous 
b)
asexual
c)
homologous
d)
genes
4.
A male shark has 40 chromosomes in each of its sex cells. How many would be present in its body cells?
a)
20
b)
40
c)
80
d)
160
5.
Which letter(s) in the diagram correspond to cells that are haploid? 
a)
A
b)
B
c)
C
d)
A and B
6.
Compared to the number of chromosomes contained in a body cell, how many chromosomes would normally be contained in a gamete?
a)
The same number
b)
One-fourth as many
c)
Twice as many
d)
Half as many
7.
What causes genetic variation in meiosis?
a)
chromosomes lining up
b)
crossing over of chromosomes
c)
separation of chromosomes
d)
chromosomes pulling apart
8.
What is one of the advantages, why is it better to reproduce sexually versus asexually?
a)
survival of the fittest
b)
overproduction
c)
genetic variation
d)
cloning
9.
Chromosomes exchange genetic material during 
a)
crossing over
b)
replication
c)
synthesis
d)
translation
10.
A human zygote should have _____ chromosomes inside.
a)
46
b)
23
c)
92
d)
64
11.
What do experts say is the most common form of Down Syndrome?
a)
Trisomy 47
b)
Trisomy 46
c)
Trisomy 21
d)
Trisomy 23
12.
Females have ____ and males have _____ chromosomes.
a)
XX, XY
b)
XY, XX
c)
XX, XX
d)
XY, XY
13.
What is this?
a)
Trisomy 13
b)
Monosomy 21
c)
47, XXY
d)
Trisomy 21
14.

CROSSING OVER INCREASES

a)

LIFE SPAN

b)

GENETIC VARIATION

c)

THE NUMBER OF OFF-SPRING

d)

ALL ARE TRUE

15.

Human body cells have 46 chromosomes, how many chromosomes are found in a human egg cell?

a)

46

b)

23

c)

12

d)

92

16.

a photograph or picture of chromosomes grouped in ordered pairs is a ______________

a)

pedigree

b)

Punnett Square

c)

Venn Diagram

d)

Karyotype

17.
Which sex chromosomes would indicate a typical human male?
a)
XX
b)
X
c)
XY
d)
XXY
18.

You are viewing a patients karyotype. You see 23 chromosomes total. There are no homologous chromosomes. Which type of cell are you viewing?

a)

Egg cell

b)

Zygote

c)

Skin cell

d)

White blood cell

19.

Based on the karyotype, what is the sex of this baby?

a)

Male

b)

Female

20.
Is this Karyotype human?
a)
Yes
b)
No
c)
Impossible to Determine
21.
What is the haploid number for this Karyotype?
a)
26
b)
27
c)
52
d)
54
22.

If the Diploid number for carrots is 18, the haploid number is

a)

18

b)

9

c)

27

d)

36

23.

What is the diploid number of chromosomes for a bat if the sperm cell has 22 chromosomes?

a)

22

b)

11

c)

44

d)

21

24.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
25.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous genes
d)
mutated DNA
26.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
27.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both 
28.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
29.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
30.
T = tall an t = short
What is the phenotype for Tt?
a)
short
b)
tall
c)
medium sized
d)
neither tall or short
31.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
32.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
33.
In a Punnett square each box represents a(n)....
a)
offspring
b)
parent
c)
gene
d)
trait
34.
characteristic that is inherited; can be either dominant or recessive
a)
genes
b)
allele
c)
chromosome
d)
trait
35.
The genetic characteristics of recessive genes
a)
tend to mask the characteristics of dominant genes.
b)
are always expressed in the phenotype.
c)
are usually codominant.
d)
tend to be masked by the characteristics of dominant genes.
36.
TT,tt,PP,pp,SS,ss are examples of alleles that are?
a)
homozygous
b)
heterozygous
c)
different
d)
homologous 
37.

Alternate or different genes that code for the same trait are called?

a)

chromosomes

b)

segments

c)

alleles.

d)

homozygous.

38.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
39.
this image is an example of
a)
codominance
b)
dominance
c)
incomplete dominance
40.
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
41.
If this image were real, it would represent what type of inheritance?
a)
incomplete dominance
b)
codominance
c)
polygenic inheritance
d)
compete dominance
42.

A roan cow shows codominance in fur color (brown and white). What is the phenotype ratio expected in offspring a female roan and a male roan mate together?

a)

All four would be brown and White

b)

Half would be orange, half would be white

c)

2 Brown: 2 Brown and White: 0 White

d)

1 Brown: 2 Brown and White: 1 White

43.

11. Gametes are produced by the process of ------------

a)

A. mitosis

b)

B. meiosis

c)

C. crossing-over

d)

D. replication

44.

13. Which of the following genotype shows the female who is the carrier for Haemophilia?

a)

A. Xh Xh

b)

B. XH XH

c)

C. XH Xh

d)

D. Xh Y

45.
If a woman is a carrier for a sex linked recessive trait of hemophilia and her husband has hemophilia, which of the following is true? Make a punnett square!
a)
All sons will have hemophilia
b)
all daughters will have hemophilia
c)
50% of daughters and 50% of sons have hemophilia
d)
100% of sons have hemophilia and 100% of daughters are carriers
46.
Alleles that are inherited on the X or Y chromosomes:
a)
multiple alleles
b)
sex-linked genes
c)
codominance
d)
polygenic inheritance
47.
Hemophilia is an 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%
48.
According to _______, genes that are closer together on a chromosome, have a higher chance of being inherited together.  
a)
Gene Linkage
b)
Polygenic
c)
Pleiotropy
d)
Epistasis
49.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
50.
Which best describes the process shown?
a)
mutation in which the DNA content of the gene is ltered
b)
segregation of sister chromatids
c)
condensation and segregation of the alleles
d)
crossing-over which alleles are exchanged
51.
True or False: Men can NEVER be "carriers" for recessive sex-linked traits because they only have one X chromosome.
a)
True
b)
False
52.

(Grey fur (G) is dominant over white fur (g) and Black eyes (B) are dominant over red eyes(b))

A male rabbit GGbb crossed with a female rabbit with ggBb.

How many out of 16, have grey fur and black eyes?

a)

4

b)

8

c)

12

d)

16

53.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
54.
What is the genotype for a pea plant heterozygous for round seeds (R), and homozygous recessive for green seeds (y)?
a)
Ry
b)
RRyy
c)
RrYy
d)
Rryy
55.

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

56.
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
57.
Bacteria undergo which type of reproduction? 
a)
asexual
b)
sexual
58.
What is NOT a possible genotype for someone with type B blood?
a)
IBIB
b)
IAIB
c)
IB i
59.
which blood type is the universal donor (all people can receive it)?
a)
O
b)
AB
c)
A
d)
B
60.

In the image above, what is the percentage of the offspring has the possibility of inheriting blood type O?

a)

0%

b)

25%

c)

50%

d)

100%

61.

Which of the following codes for blood type O?

a)

IA IA

b)

IB i

c)

IA IB

d)

ii

62.

What pattern of non-Mendelian inheritance is shown by ABO blood group?

a)

Codominance

b)

Incomplete Dominance

c)

Multiple Alleles

d)

X-linked

63.
Which significance level  
(column) do you look at when finding the critical value?
a)
.50
b)
.10
c)
.05
d)
.01
64.
How do you find degrees of freedom?
a)
one less than the possible genotypes
b)
one less than the possible phenotypes
c)
total number divided 2
d)
total number times 2
65.
Observed in the wild are 10 circles, 20 squares and 30 triangles. The ratio for this particular population is 2:3:5 
observed: 10 circles     expected: 12
observed 20 squares    expected : 18
observed 30 triangles   expected: 30
What is the degrees of freedom?
a)
1
b)
2
c)
3
d)
4
66.

A chart that displays family relationships indicating traits or disorders

a)

Punnett square

b)

Pedigree

c)

Karyotype chart

67.

In a pedigree chart, females are represented by

a)

Circles

b)

Diamonds

c)

Squares

68.

In a pedigree, individuals that are affected are represented as shapes that are

a)

Not shaded

b)

Fully shaded

c)

Half shaded

69.

In a pedigree chart, males are represented by

a)

Circles

b)

Diamonds

c)

Squares

70.
When DNA is manipulated and moved from one source to another it is known as
a)
genetic engineering
b)
electrophoresis
c)
gene therapy
d)
GMO
71.
Making changes in the DNA of an organism is
a)
selective breeding
b)
artificial selection
c)
genetic engineering
d)
genetic transformation

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