NEW
Font size
S
M
L
XL
WorksheetsPunnett Squares
Total questions: 15
Worksheet time: 11mins
Name
Class
Date
1.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
2.
AA and Aa always are expressed as being _______.
a)
dominant
b)
recessive
c)
heterozygous
d)
homozygous
3.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
4.
In the punnett square shown, what must the genotype of the missing parent be?
a)
BB
b)
Bb
c)
bb
d)
Tt
5.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
Rr
c)
RR
d)
Either RR or Rr
6.
What you see, or the physical appearance is referred to as ______.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
7.
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
8.
What does heterozygous mean?
a)
An organism that has the same size alleles for a trait
b)
An organism that has different sized alleles for a trait
c)
When neither allele is fully dominant; offspring is a mixture of both
d)
the different forms of a trait (hair color--> brown, blonde, red
9.
In a heterozygous genotype, the _____ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
10.
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%
11.
In the punnett square shown, what are the genotypes of the two parents?
a)
RW and RR
b)
RW and WW
c)
RR and WW
d)
RW and RR
12.
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%
13.
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
14.
What is the genotypic %'s?
a)
25% blue eye 75 % brown eye
b)
BB = 25% Bb = 50% bb = 25%
c)
BB= 50 % bb = 50%
d)
All brown eye
15.
How many alleles are present in HHMmNn
a)
6
b)
4
c)
2
d)
12
Reset
