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WorksheetsPunnett Squares
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
2.
Dominant or recessive?
Dd
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
3.
Emily has brown hair. Which is most likely a true statement about Emily?
a)
Emily’s favorite color is brown.
b)
Emily has a parent with brown hair.
c)
Emily’s older brother has brown hair.
4.
What should students use to identify the percent chance of a trait being passed down from a parent to its offspring?
a)
a graph
b)
a flow chart
c)
a data table
d)
a Punnett square
5.
Which statement best supports why many offspring look similar to their parents?
a)
Offspring inherit characteristics from one parent.
b)
Offspring inherit characteristics from both parents.
c)
Parents choose which characteristics to pass on to their offspring.
d)
Parents choose to change their appearance to match that of their offspring.
6.
Bob is a tall, slender young man with red hair and blue eyes. Which couple would most likely be Bob’s parents?
a)
a slender, red-haired father and a tall, blue-eyed mother
b)
a tall green-eyed father with long brown hair and a short, brown-haired mother
c)
a short, green-eyed, black-haired father and a tall, brown haired, brown-eyed mother
d)
a short, plump brown-haired father with freckles and a short, blue-eyed red-haired mother
7.
What are the possible combinations of a pea plant with the alleles PP and a male pea plant with the alleles pp.
P= purple
p= white
P= purple
p= white
a)
all Pp
b)
all PP
c)
Pp,PP,Pp,PP
d)
all pp
8.
When the allele combination is a dominate and a recessive trait together which trait will be seen?
a)
Dominate
b)
Recessive
c)
none
d)
both
9.
Homozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
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.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
12.
What is a phenotype?
a)
The expression of a trait; physical appearance.
b)
refers to the genetic makeup of an individual
c)
An organism that has the same genes for a trait (ex. TT or tt)
d)
the passing of traits from parent to offspring
13.
This means Different Gene
a)
Dominant
b)
Recessive
c)
Homozygous
d)
Heterozygous
14.
Homozygous or heterozygous?
BB
BB
a)
Homozygous
b)
Heterozygous
15.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
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