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Biology revision

Total questions: 72

Worksheet time: 1hrs 2mins

Name
Class
Date
1.
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
2.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
3.
What type of heredity is shown in the pedigree?
(hint: check your notes - "modes of inheritance")
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
4.

If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?

a)

HH

b)

Hh

c)

hh

5.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
6.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
7.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
8.
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
9.
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
10.
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
11.
Huntington's Disease is a dominant trait.
What is the correct genotype for individual I-2?
a)
HH
b)
Hh
c)
hh
d)
H_
12.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
13.
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 
14.
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
15.
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.
16.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
17.
Lisa has two grandmothers in this picture.
a)
Mona and Jackie
b)
Marge and Mona
c)
Selma and Jackie
d)
Patty and Selma
18.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
19.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
could be homozygous dominant
b)
could  be homozygous recessive
c)
could be heterozygous
d)
Can't tell
20.
How many girls in this family express this recessive disorder?
a)
4
b)
5
c)
6
d)
7
21.

What is the genotype of both great-grandsons? (Individuals 13 and 16)

a)

AA

b)

Aa

c)

A_

d)

aa

22.
What is the genotype of the great-grandfather? (Individual 2)
a)
A_
b)
aa
c)
Aa
d)
AA
23.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
24.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
25.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
26.
What do half colored symbols represent?
a)
The individual is a carrier.
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
27.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
28.
How many chromosomes are shown in a normal human karyotype?
a)
2
b)
12
c)
25
d)
46
29.
Chromosome that is not a sex chromosome
a)
Chromosome
b)
Autosome
c)
Sex Chromosome
d)
Homologous pair
30.
Chart that shows the relationships within a family
a)
Pedigree
b)
Karyotype
c)
T chart
d)
Key
31.
Photograph of chromosomes grouped in ordered pairs
a)
pedigree
b)
Punnett Square
c)
Venn Diagram
d)
Karyotype
32.
Because hemophilia is a sex-linked disorder, it occurs more frequently in females than males?
a)
True
b)
False
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.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
35.
By looking at this karyotype you can determine that this person ______ ________.
a)
has Downs Syndrome
b)
has Monosomy X (Turners Syndrome)
c)
is  normal
d)
has Trisomy 13(Patau Syndrome)
36.
What can you  determine about this person based on their karyotype?
a)
They have Downs Syndrome
b)
They have Turner's Syndrome
c)
They have Edward's Syndrome
d)
They are completely Normal
37.
Looking at this pedigree, how many female family members are carriers?
a)
1
b)
3
c)
10
d)
7
38.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
39.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
40.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
41.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
42.
If B = brown hair and b = blonde hair, what is the probability of brown hair?
a)
25%
b)
50%
c)
0%
d)
75%
43.
In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?
a)
100% purple flowers
b)
100% white flowers
c)
75% white flowers, 25% purple flowers
d)
25% white flowers, 75% purple flowers
44.
Phenylketonuria (PKU) is inherited as a recessive condition. A man with PKU marries a woman without any alleles for PKU. What is the probability that their child will inherit PKU?
a)
0%
b)
25%
c)
50%
d)
75%
45.
Why do all the daughters in Generation II carry the colorblind gene?
a)
Because mom passed on the gene.
b)
Because dad passed on the X chromosome.
c)
Because their brother has it.
d)
Because their brother gave it to them.
46.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
47.
Give the genotype for person II-1
a)
GG
b)
Gg
c)
gg
48.
What is the mode of inheritance shown here?
a)
 Recessive
b)
Sex Linked
c)
 Dominant
49.
What does a filled in square represent?
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
50.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
51.
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
52.
What does an open circle represent?
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
53.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
54.
What is this?
a)
Pedigree
b)
Karyotype
c)
Venn diagram
d)
Punnett Square
55.

How many alleles does a person carry for a trait?

a)

1

b)

2

c)

3

d)

4

56.

How many alleles does a child get from each parent for a trait?

a)

1

b)

2

c)

3

d)

4

57.

Dominant alleles are represented by a ---

a)

capital letter.

b)

lowercase letter.

58.

In a heterozygous genotype, the _____ allele takes over in the phenotype.

a)

recessive

b)

dominant

c)

both

59.

What you see, or the physical appearance of an organism, is called the ---

a)

genotype.

b)

phenotype.

60.
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
61.

In a pedigree, which shape represents a male?

a)

circle

b)

square

62.

Which gender has an X and a Y chromosome?

a)

male

b)

female

63.

On a pedigree, this symbol represents a ---

a)

not affected female.

b)

not affected male.

c)

affected male.

d)

affected female.

64.

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

a)

not affected male.

b)

not affected female.

c)

affected male.

d)

affected female.

65.

How many individuals are there in the 3rd generation?

a)

1

b)

2

c)

4

d)

6

66.

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

67.

What is the mode of inheritance shown here?

a)

Recessive

b)

Dominant

68.

In the second generation of this pedigree, how many people are carriers of the trait?

a)

1

b)

2

c)

3

d)

5

69.

On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -

a)

the male is heterozygous and the female is heterozygous.

b)

the male is homozygous recessive and the female is homozygous dominant.

70.

Why do all the daughters in Generation II carry the colorblind gene?

a)

Because mom passed on the gene.

b)

Because dad passed on the X chromosome.

71.

The trait this pedigree traces is recessive because it skips a generation and individuals can be carriers. What is the most likely genotype for person III-3?

a)

GG

b)

Gg

c)

gg

72.

If this pedigree shows a recessive disorder, what MUST the genotype of individual II-3 be?

a)

HH

b)

Hh

c)

hh

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