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WorksheetsPunnett Squares
Total questions: 11
Worksheet time: 9mins
Name
Class
Date
1.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
2.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
3.
What is the probability of heterozygous offspring?
a)
25%
b)
50%
c)
0%
d)
100%
4.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
5.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
6.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
7.
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
8.
What is the phenotype of the offspring? (A-Brown hair; a-blond hair)
a)
50 % Brown Hair and 50% Blond Hair
b)
25 % Brown Hair and 75% Blond Hair
c)
75 % Brown Hair and 25% Blond Hair
d)
0% Brown Hair and 100% Blond Hair
9.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
10.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
11.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
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