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Genetics: Punnett Squares and Pedigrees

Total questions: 25

Worksheet time: 50mins

Name
Class
Date
1.
Which of the following is heterozygous
a)
FF
b)
tt
c)
Gg
d)
RR
2.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
3.
Which of the following is homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
4.
The physical appearance of a trait is known as the-
a)
genotype
b)
phenotype
c)
characteristics
d)
intelligence
5.
How many letters does a genotype contain?
a)
1
b)
2
c)
3
d)
4
6.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype?
a)
Brown Hair
b)
Blonde Hair
c)
Brown and Blonde Hair
d)
Black Hair
7.

If Purple Flowers (P) are dominant over white flowers (p), what would the phenotype be for a Pp genotype?

a)

Purple flowers

b)

White flowers

c)

Not enough information

8.

If Purple Flowers (P) are dominant over white flowers (p), what would the phenotype be for a pp genotype?

a)

Purple flowers

b)

White flowers

c)

Not enough information

9.

Segments of DNA are called _______________________

a)

Genes

b)

Alleles

c)

Traits

d)

Chromosomes

10.

Which of the following is the correct definition for a genotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

11.

Which of the following is the correct definition for a phenotype?

a)

The physical expression of a gene. (Characteristics)

b)

A strand of DNA made up of multiple mutations.

c)

The expression of one of your parents traits.

d)

The set of genes in our DNA which is responsible for a particular trait.

12.

The different forms of a gene are called ---

a)

traits

b)

hybrids

c)

alleles

13.

In a punnett square where is the parent information written?

a)

In the boxes

b)

Along the top and side

14.

In punnett squares, where is the possible offspring information written?

a)

In the boxes.

b)

Along the top and side.

15.
When the allele combination is a dominate and a recessive trait together which trait will be seen?
a)
Dominate
b)
Recessive
c)
none
d)
both
16.
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%
17.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
18.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
19.
Which choice best represents the genotype of this cross?
a)
1 Yy: 2 yy: 0 YY
b)
2 Yy: 2 yy: 0 YY
c)
3 Yy: 1 yy: 0 YY
d)
1 Yy: 3 yy: 0 YY
20.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
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 people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
23.
What is this?
a)
Pedigree
b)
Karyotype
c)
Venn diagram
d)
Punnett Square
24.
How many individuals are there in the 3rd generation?
a)
2
b)
3
c)
4
d)
6
25.
How many people in the pedigree are carriers for the disorder? 
a)
b)
8
c)
2
d)
9