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WorksheetsPedigree Charts and Punnett Squares
Total questions: 20
Worksheet time: 25mins
Name
Class
Date
1.
T - tall and t = short
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
2.
G = green, g = yellow
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
3.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
4.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
5.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
6.
AA and Aa always show up as
a)
dominant
b)
recessive
7.
Each one of the boxes on the Punnett Square represents what probability of an offsprings' genotype?
a)
25%
b)
1%
c)
10%
d)
0%
8.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
9.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
10.
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
11.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
12.
How are individuals III-2 and II-4 related?
a)
Cousins
b)
Dad and Daughter
c)
Uncle and Niece
d)
Grandpa and Granddaughter
13.
If this pedigree shows a recessive disorder, what MUST the genotype of individual II-3 be?
a)
HH
b)
Hh
c)
hh
d)
None of the above
14.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
15.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
16.
How many girls did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
17.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
18.
Is this trait (the shaded individuals) dominant or recessive?
a)
dominant
b)
recessive
19.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
20.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
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