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Pedigrees

Total questions: 40

Worksheet time: 41mins

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.
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.
13.
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
14.
How many girls in this family express this recessive disorder?
a)
4
b)
5
c)
6
d)
7
15.

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

a)

AA

b)

Aa

c)

A_

d)

aa

16.
What is the genotype of the great-grandfather? (Individual 2)
a)
A_
b)
aa
c)
Aa
d)
AA
17.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
18.
How many children did I-3 and I-4 have?
a)
2
b)
3
c)
4
d)
5
19.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
20.
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
21.
What does a horizontal line between a square and a circle mean?
a)
They are siblings
b)
They are cousins
c)
They are married ("together")
d)
They are the children
22.
What does a vertical line coming down from a square and circle that are connected by horizontal line indicate?
a)
They are cousins
b)
The children
c)
Aunts and Uncles
23.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
24.
Does this pedigree show a dominant or recessive trait?
a)
Dominant
b)
Recessive
25.
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 
26.
Give the genotype for person III-3
a)
GG
b)
Gg
c)
gg
27.

The pedigree is showing a _____________ trait.

a)

autosomal dominant

b)

autosomal recessive

c)

sex linked recessive

28.
What is the genotype of the mother?
a)
BB
b)
bb
c)
Bb
d)
BB or Bb
29.

This is a __ trait.

a)

autosomal recessive

b)

sex-linked recessive

c)

autosomal dominant

30.

This trait is

a)

autosomal recessive.

b)

sex-linked recessive.

c)

autosomal dominant.

31.

Generation 2 individuals 5 and 6 are

a)

brother and sister.

b)

cousins.

c)

married.

d)

not related.

32.
What type of heredity is shown in the pedigree?
a)
Sex-Linked Dominant
b)
Sex-Linked Recessive
c)
Autosomal Dominant
d)
Autosomal Recessive 
33.

pedigreeWhat type of heredity is shown in the pedigree?

a)

Sex-Linked Recessive

b)

Autosomal Dominant

c)

Autosomal Recessive

34.

What is the mode of inheritance shown here?

a)

Sex Linked Recessive

b)

Autosomal Dominant

c)

Autosomal Recessive

35.

In a pedigree, circles represent _____

a)

males

b)

females

36.

In a pedigree, a person AFFECTED by a trait is

a)

shaded

b)

unshaded

37.

Assuming a trait is AUTOSOMAL DOMINANT, what genotypes could make a person AFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

38.

Assuming a trait is AUTOSOMAL DOMINANT, what genotype would make a person UNAFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

39.

Assuming a trait is AUTOSOMAL RECESSIVE, what genotype would make a person AFFECTED?

a)

AA

b)

Aa

c)

aa

d)

XAY

e)

XaY

40.

Assuming a trait is X-LINKED RECESSIVE, what are the genotypes of an AFFECTED person?

a)

XAY

b)

XaY

c)

XAXA

d)

XAXa

e)

XaXa

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