NEW
Font size
S
M
L
XL
WorksheetsPunnett Squares Bell Ringer
Total questions: 12
Worksheet time: 27mins
Name
Class
Date
1.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T
Short = S
Short = S
b)
Tall = T
Short = t
Short = t
c)
Tall = t
Short = T
Short = T
d)
Tall = TT
Short = tt
Short = tt
2.
Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?
a)
Red
b)
Blue
c)
Purple
d)
50% Red, 50% Blue
3.
A brown-furred ewok has 12 babies with a black-furred ewok. 9 ewok babies have black fur, while 3 ewok babies have brown fur. What are the probable genotypes of the parents?
a)
BB and bb
b)
BB and Bb
c)
Bb and Bb
d)
Bb and bb
4.
A Jawa notices that his beloved pet desert rat, who has brown fur, just had several rat babies, some of which had white fur and some which had brown fur. Brown fur is the dominant trait. This means his rat must have what genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
5.
Identify the homozygous dominant genotype:
a)
FF
b)
Ff
c)
ff
6.
What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?
a)
Pp
b)
Purple
c)
White
d)
PP and pp
7.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
8.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
9.
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
10.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
11.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
12.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
Reset
