NEW
Font size
S
M
L
XL
WorksheetsPunnett Square Quiz
Total questions: 19
Worksheet time: 10mins
Name
Class
Date
1.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
2.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
3.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
4.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
5.
AA and Aa always show up as
a)
dominant
b)
recessive
6.
aa always shows up as
a)
dominant
b)
recessive
7.
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
8.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
9.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
10.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
11.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
12.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
13.
Stuart Snail is heterozygous for tall eyeballs. Sally Snail has tall eyeballs but does carry the recessive allele. What are the chances that their baby snail would have short eyeballs?
a)
75%
b)
50%
c)
25%
d)
0%
14.
Gary Goldfish is heterozygous for dark orange color. Ginny Goldfish is homozygous dominant. Their baby has light orange color. Is Gary the father?
a)
Yes, because the light orange color is dominant
b)
No, because there is no way they could produce a homozygous recessive baby
c)
Yes, because Ginny has two alleles for light orange color, so their baby could be light orange
d)
No, because Gary does not have the allele for light color.
15.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
16.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
17.
Black hair color is dominant to white hair color in mice. Determine the phenotypic ratio for the offpring of a heterozygous black mouse and a white mouse.
a)
4 Black: 0 White
b)
3 Black: 1 White
c)
2 Black: 2 White
d)
0 Black: 4 White
18.
Black hair color is dominant to white hair color in mice. Determine the phenotypic ratio for the offpring of a heterozygous black mouse and a white mouse.
a)
4 Black: 0 White
b)
3 Black: 1 White
c)
2 Black: 2 White
d)
0 Black: 4 White
19.
In certain species of plants, purple flowers (P) are dominant to white flowers (p). If two heterozygous plants are crossed, what will be the phenotype of the offspring?
a)
100% purple flowers
b)
100% white flowers
c)
75% white flowers, 25% purple flowers
d)
25% white flowers, 75% purple flowers
Reset
