WorksheetsDominant Recessive Homozygous Heterozygous Phenotype Genotype
Total questions: 18
Worksheet time: 11mins
Name
Class
Date
1.
Which of the following is Heterozygous?
a)
Two of the same recessive allele (aa)
b)
Two of the same dominant allele (AA)
c)
Two different alleles (Aa)
d)
Two different genes (AB)
2.
Which of the following is Homozygous Recessive?
a)
AA
b)
Aa
c)
aa
d)
aA
3.
Which of the following is Homozygous Dominant?
a)
RR
b)
rr
c)
Rr
d)
Rp
4.
Brown eyes (B) are dominant to blue eyes (b). What is the phenotype of a person who is Bb?
a)
Blue Eyes
b)
Brown Eyes
c)
70% Brown
d)
25% Blue
5.
Brown eyes (B) are dominant to blue eyes (b). What is the genotype of a person with blue eyes?
a)
Homozygous Dominant (BB)
b)
Homozygous Recessive (bb)
c)
Heterozygous (Bb)
d)
Single Recessive (b)
6.
What is a gene?
a)
Section of DNA that codes for mutations
b)
ection of DNA that codes for the DNA sequence
c)
Section of DNA that codes for evolution
d)
Section of DNA that codes for our traits
7.
What genotype belongs in the box with the question mark?
a)
AA
b)
Aa
c)
aA
d)
aa
8.
What genotype belongs in the top right box?
a)
TT
b)
tt
c)
Tt
9.
What is the probability that the offspring will be Homozygous Recessive?
a)
0%
b)
25%
c)
50%
d)
100%
10.
What is the probability that the offspring will be yellow?
a)
100%
b)
50%
c)
25%
d)
0%
11.
What two parents could produce at least one offspring that shows the recessive trait?
a)
Aa x Aa
b)
Aa x AA
c)
AA x aa
d)
AA x AA
12.
Could two parents that show the dominant trait produce offspring with the recessive trait?
a)
Yes
b)
No
c)
Not enough information
d)
I don't know
13.
If tall (T) is dominant to short (t), which of these offspring will be short?
a)
TT
b)
Tt
c)
tt
d)
tT
14.
What is the probability that the offspring will have the dominant trait?
a)
1:4
b)
2:4
c)
3:4
d)
4:4
15.
Which word describes an organism's physical characteristics?
a)
Heterozygous
b)
Homozygous
c)
Phenotype
d)
Genotype
16.
The genes an organism possesses or its genetic makeup is called
a)
phenotype
b)
genotype
c)
homozygous
d)
heterozygous
17.
Which type of inheritance results in offspring having a different phenotype than either parent?
a)
codominance
b)
incomplete dominance
c)
phenotype
d)
genotype
18.
Which type of inheritance results in the offspring having a phenotype that represents both parents?
a)
genotype
b)
phenotype
c)
incomplete dominance
d)
codominance
100 %
