WorksheetsPUnnett Squares
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
2.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
3.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
4.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
5.
T = tall an t = short
TT and Tt would result in the following phenotype
TT and Tt would result in the following phenotype
a)
short
b)
tall
c)
both tall and short
d)
neither tall or short
6.
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
7.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
8.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
9.
Which of the following is NOT a nitrogen base in DNA?
a)
adenine
b)
cytosine
c)
guanine
d)
uracil
10.
In this punnett square, what is the missing genotype?
a)
AA
b)
AO
c)
AB
d)
BB
11.
What pattern of inheritance does this punnett square follow?
a)
dominant/recessive
b)
codominance
c)
multiple alleles
d)
polygenic inheritance
12.
R = red and W = white
In the RW genotype = pink
What pattern of inheritance is being shown?
In the RW genotype = pink
What pattern of inheritance is being shown?
a)
dominant/recessive
b)
codomimance
c)
multiple alleles
d)
polygenic inheritance
13.
In a DNA molecule, if there are 5 adenines, thre should be _______________ thymines.
a)
10
b)
5
c)
2.5
d)
cannot tell
14.
If a DNA molecule had 10% of it being adenine, what would be the percentage of guanine?
a)
10%
b)
20%
c)
80%
d)
40%
15.
Eye color, skin color, and hair color are examples of traits that are controlled by...
a)
dominant/recessive traits
b)
polygenic inheritance
c)
mulitple alleles
d)
codomiance
16.
What would be the genotype for a person who has HOMOZYGOUS B blood?
a)
BO
b)
AO
c)
AB
d)
BB
17.
What would be the genotype for someone who has Type O blood?
a)
AO
b)
BO
c)
OO
d)
All the choices above can result in Type O blood
18.
When one trait is controlled by many genes, this is called
a)
mutliple alleles
b)
polygenic inheritance
c)
codominance
d)
multiple gene syndrome
19.
In the diagram, what is the genotype of the two plants found in the second generation (F1)?
a)
GG
b)
Gg
c)
gg
d)
cannot tell from the data available
20.
In the punnett square shown, what is the genotypes of the two parents?
a)
RW and RR
b)
RW and WW
c)
RR and WW
d)
RW and RR
100 %
