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Genetics Study Guide

Total questions: 62

Worksheet time: 51mins

Name
Class
Date
1.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
2.
What law states that in Tt the person will only show the dominant allele
a)
law of segregation
b)
law of independent assortment
c)
law of dominance
d)
law of punnett squares
3.
Genotype refers to the ...
a)
physical expression of the genes
b)
the possible combination of alleles in a gene
c)
whether an allele is dominant or recessive
d)
how an organism will appear
4.

Squidward has light blue skin, and his genotype for this trait is Bb. Which of the following would describe Squidward?

a)

Purebred

b)

Hybrid

c)

Homozygous

d)

Sex-linked

5.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
6.
the passing of genetic traits from parent to offspring.
a)
heredity
b)
trait
c)
gene
d)
allele
7.
having two of the same genes for the trait (sometimes called purebred).
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
8.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
9.
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
10.
Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?
a)
50% tall and 50% short
b)
75%tall and 25% short
c)
100%short
11.

Describe the law of independent assortment

a)

two alleles for each trait separate during meiosis.

b)

the new combination of genes produced by crossing over

c)

Random distributions of alleles occurs during gamete formation .

12.

The law of segregation states that

a)

a random distribution of alleles occurs during gamete formation

b)

is the process in which chromosomal segments are exchanged between a pair of homologous chromosomes

c)

the two alleles for each trait separate during meiosis

13.

What is the process when chromosomal segments are exchanged between a pair of homologous chrmomosomes?

a)

Law of Independent Assortment

b)

Law of Segregation

c)

Crossing Over

14.
What does the prefix hetero- in heterozygous mean?
a)
same
b)
different
c)
dating
d)
human
15.
What does the prefix homo- in homozygous mean?
a)
same
b)
different
c)
dating
d)
humans
16.
rr
a)
Homozygous Dominant
b)
Homozygous Recessive
c)
Heterozygous
d)
Heterozygous Recessive
17.
Which of the following is heterozygous
a)
FF
b)
tt
c)
Gg
d)
RR
18.
Sickle cell anemia is a disorder carried on the X chromosome.  What type of inheritance pattern does it follow?
a)
codominance
b)
sex-linked inheritance
c)
multiple allele inheritance
d)
incomplete dominance
19.

The diagram shown represents a female human karyotype. What mutation does she have ?

a)

a missing X chromosome

b)

a missing Y chromosome

c)

an extra chromosome on chromosome 9.

d)

a deletion of a section of chromosome 21

20.

Human body cells each have 46 chromosomes in their nuclei. Meiosis is necessary in order to ensure that each gamete produced in the human body has --

a)

12 chromosomes

b)

23 chromosomes

c)

46 chromosomes

d)

92 chromosomes

21.

The common field mouse, Mus musculus, contains 40 chromosomes in its somatic cells. What is this species’ haploid number?

a)

80

b)

20

c)

10

d)

40

22.
Determine the sex of the individual whose karyotype is displayed in the image.
a)
female
b)
male
23.
Determine the sex of the individual whose karyotype is displayed in the image.
a)
female
b)
male
24.
Which structure is labeled as A in the diagram?
a)
Centromere
b)
Chromosome
c)
Sister chromatids
25.
Nondisjunction can result in 
a)
trisomy conditions
b)
monosomy conditions
c)
additional sex chromosomes
d)
all of these
26.
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
27.
A sperm contains
a)
Both an X and a Y chromosome
b)
Two X chromosomes
c)
An X OR a Y chromosome
d)
only a Y chromosome
28.
What makes this individual's karyotype not normal?
a)
An extra sex chromosome
b)
An extra autosome
c)
A missing sex chromosome
d)
A missing autosome
29.
What is the sex of this individual?
a)
female
b)
male
30.
Chromosome pairs 1-22 are referred to as
a)
sex chromosomes
b)
sister chromatids
c)
a karyotype
d)
autsomes
31.
A picture of paired chromosomes is a
a)
sister chromatid
b)
centromere
c)
syndrome
d)
karyotype
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.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia. 
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY 
34.
How many children did I-3 and I-4 have?
a)
2
b)
3
c)
4
d)
5
35.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
36.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
37.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
38.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
39.
How many girls did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
40.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
41.
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
42.
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
43.
What do we use pedigrees for?
a)
To look at families
b)
To make determinations about the offspring
c)
To track traits in families
d)
Nothing
44.
What is the mode of inheritance shown here?
a)
 Recessive
b)
Sex Linked
c)
 Dominant
45.

The proteins found on the surface of RBCs that allow us to type blood as A, B, O or AB are called

a)

antigens

b)

antibodies

c)

aggluntates

d)

Rh factors

46.

What is produced by your body in response to foreign antigens, such as the wrong type of blood?

a)

agglutinates

b)

clotting factors

c)

phagocytes

d)

antibodies

47.

Tyler has blood type AB+, he can donate blood to a person that has blood type?

a)

AB+

b)

AB-

c)

O-

d)

O+

48.

Which blood type has Type A antibodies?

a)

Type AB

b)

Type O

c)

Type B

d)

Type B and Type O

49.

Laney is the universal donor, what blood type does she have?

a)

O-

b)

O+

c)

AB+

d)

AB-

50.

Destiny has blood type B, what antigen is present?

a)

None

b)

A

c)

B

d)

A and B

51.
If a father is AA and a mother is AB, what is the probability for a child with AB blood? 
a)
0%
b)
25%
c)
50%
d)
75%
52.
If two parents have type AB blood, what is the probability that their child will have type O blood?
a)
0%
b)
25%
c)
50%
d)
100%
53.

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)

IB i

b)

IB IB

c)

ii

d)

type B blood

54.
If a red blood cell has no antigens on its surface, what is its blood type?
a)
A
b)
B
c)
AB
d)
O
55.

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

56.

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

57.

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

a)

male with red eyes

b)

female with red eyes

c)

male with white eyes

d)

female with white eyes

58.

What are the genotypes of these flies:


white eyed, male ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

XR Y

59.

What are the genotypes of these flies:


red eyed female (heterozygous) ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

X R Y

60.

What are the genotypes of these flies:


red eyed, male ?

a)

X R X r

b)

X R X R

c)

Xr X r

d)

X r Y

e)

X R Y

61.

In a cross between a pure red eyed female and a white eyed male, what would the genotypes of the parents be?

a)

XRXr with XR Y

b)

XRXr with Xr Y

c)

XRXR with XR Y

d)

XRXR with Xr Y

e)

XrXr with Xr Y

62.

H= normal blood clotting

h=hemophilia


XHXh x XHY


What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

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