3.3.5 Genetics - Punnett Squares questions and
answers already A+
1 Patrick found Patricia at a store and both of them are homozygous dominant for their pink body color. Create a
Punnett square to show the possibilities of the offspring. HINT: Read question #3!
A. Build the Punnett Square for the question above.
A A
A AA AA
Ady graded AA AA
A+A
B. What are the chances of a child with a pink body?
100%
C. What are the chances of a child with a yellow body?
0%
Scientists are measuring the effects of the nuclear testing that occurs at Bikini Atoll. After viewing life in the lagoon, use
the information provided and your knowledge of genetics to answer each question.
2. For each genotype below, (underline) the heterozygous and mark an X for homozygous
AA x Bb cc x Dd ee x FF x Gg hh x JJ x kk x
Mm nn x Pp qq x rr x TT x Ww xx x Yy Zz
Would Heterozygous or Homozygous be considered purebred?
Homozygous
Would Heterozygous or Homozygous be considered hybrid?
Heterozygous
3. Determine the phenotype for each genotype using the information provided about SpongeBob.
Write your name here
Arthur Vieira Greco
Yellow body color is dominant to blue
AA Yellow Aa Yellow aa Blue
, A tall head (T) is dominant to short (t)
TT tall head Tt Tall head
Pink body color (D) is dominant to yellow (d)
DD pink body color dd yellow body color
5. SpongeBob SquarePants parents are both round sponges (not cookies!). Both his Mom and Dad have heterozygous
genotypes for their shape. Create a Punnett square to show the possibilities that would result for SpongeBob to
become SpongeBob Squarepants. HINT: Read question #2!
A. Complete the Punnett Square
A a
A AA Aa
a Aa aa
B. What are the chances of a child with a square shape?
25%
C. What are the chances of a child with a round shape?
75%
6. Everyone in Squidward’s family has light green skin, which is the dominant trait for body color in his hometown of
Squid Valley. His family brags that they are a “purebred” line. He recently married a nice girl who has light blue skin,
which is a recessive trait. Create a Punnett square to show the possibilities that would result if Squidward and his new
bride had children. Use B to represent the dominant gene and b to represent the recessive gene.
A. Build the Punnett Square for the question above.
b b
B Bb Bb
B Bb Bb
B. What are the chances of a child with light blue skin?
0%
C. What are the chances of a child with light green skin?
100%
D. Would Squidward’s children still be considered purebreds? Explain!
No, they would be considered hybrid because the genes
are different.
answers already A+
1 Patrick found Patricia at a store and both of them are homozygous dominant for their pink body color. Create a
Punnett square to show the possibilities of the offspring. HINT: Read question #3!
A. Build the Punnett Square for the question above.
A A
A AA AA
Ady graded AA AA
A+A
B. What are the chances of a child with a pink body?
100%
C. What are the chances of a child with a yellow body?
0%
Scientists are measuring the effects of the nuclear testing that occurs at Bikini Atoll. After viewing life in the lagoon, use
the information provided and your knowledge of genetics to answer each question.
2. For each genotype below, (underline) the heterozygous and mark an X for homozygous
AA x Bb cc x Dd ee x FF x Gg hh x JJ x kk x
Mm nn x Pp qq x rr x TT x Ww xx x Yy Zz
Would Heterozygous or Homozygous be considered purebred?
Homozygous
Would Heterozygous or Homozygous be considered hybrid?
Heterozygous
3. Determine the phenotype for each genotype using the information provided about SpongeBob.
Write your name here
Arthur Vieira Greco
Yellow body color is dominant to blue
AA Yellow Aa Yellow aa Blue
, A tall head (T) is dominant to short (t)
TT tall head Tt Tall head
Pink body color (D) is dominant to yellow (d)
DD pink body color dd yellow body color
5. SpongeBob SquarePants parents are both round sponges (not cookies!). Both his Mom and Dad have heterozygous
genotypes for their shape. Create a Punnett square to show the possibilities that would result for SpongeBob to
become SpongeBob Squarepants. HINT: Read question #2!
A. Complete the Punnett Square
A a
A AA Aa
a Aa aa
B. What are the chances of a child with a square shape?
25%
C. What are the chances of a child with a round shape?
75%
6. Everyone in Squidward’s family has light green skin, which is the dominant trait for body color in his hometown of
Squid Valley. His family brags that they are a “purebred” line. He recently married a nice girl who has light blue skin,
which is a recessive trait. Create a Punnett square to show the possibilities that would result if Squidward and his new
bride had children. Use B to represent the dominant gene and b to represent the recessive gene.
A. Build the Punnett Square for the question above.
b b
B Bb Bb
B Bb Bb
B. What are the chances of a child with light blue skin?
0%
C. What are the chances of a child with light green skin?
100%
D. Would Squidward’s children still be considered purebreds? Explain!
No, they would be considered hybrid because the genes
are different.
