1. Bikini Bottom Genetics
Grade 7; GLEs 17, 19, 20, 21
Based on a lesson created by T. Trimpe

2. Use the information for SpongeBob’s traits to indicate the phenotype (physical appearance) for each item.
Trait
Dominant Gene
Recessive Gene
Body Shape
Squarepants (S)
Roundpants (s)
Body Color
Yellow (Y)
Blue (y)
Eye Shape
Round (R)
Oval (r)
Nose Style
Long (L)
Stubby (l) LL yy Ss RR Rr ll ss Yy

3. Use the information for SpongeBob’s traits to indicate the genotype(s) for each trait.
Dominant Gene
Recessive Gene
Body Shape
Squarepants (S)
Roundpants (s)
Body Color
Yellow (Y)
Blue (y)
Eye Shape
Round (R)
Oval (r)
Nose Style
Long (L)
Stubby (l)
Yellow body =
Roundpants =
Oval eyes =
Long nose =
Stubby nose =
Round eyes =
Squarepants =
Blue Body =

4. TT Bb DD Ff tt dd Dd ff Tt bb BB FF
Scientists at Bikini Bottoms have been investigating the genetic makeup of the organisms in this community. Complete each section.
For each genotype below, indicate whether it is a heterozygous (He) OR homozygous (Ho). TT Bb DD Ff tt dd Dd ff Tt bb BB FF

5. SpongeBob loves growing flowers for his pal Sandy!
Her favorite flowers, Poofkins, are found in red, blue, and purple. Use the information provided and your knowledge of incomplete dominance to complete each section.
Identify the correct genotype for each flower color below if R represents a red gene and B represents a blue gene.
Red = Blue = Purple =
What would happen if SpongeBob crossed a Poofkin with red flowers with a Poofkin with blue flowers? Complete the Punnett Square to determine the chances of each flower color.
How many of the plants would have red flowers?
How many of the plants would have purple flowers?
How many of the plants would have blue flowers? % % %

6. What would happen if SpongeBob crossed two Poofkins with purple flowers? Complete the Punnett Square and probabilities below.
How many of the plants would have red flowers?
How many of the plants would have purple flowers?
How many of the plants would have blue flowers? % % %
What would happen if SpongeBob crossed a Poofkin with purple flowers with a Poofkin with blue flowers? Complete the Punnett Square and probabilities below.
How many of the plants would have red flowers?
How many of the plants would have purple flowers?
How many of the plants would have blue flowers? % % %

7. Teacher Pages

8. Use the information for SpongeBob’s traits to indicate the phenotype (physical appearance) for each item.
Trait
Dominant Gene
Recessive Gene
Body Shape
Squarepants (S)
Roundpants (s)
Body Color
Yellow (Y)
Blue (y)
Eye Shape
Round R)
Oval r)
Nose Style
Long (L)
Stubby (l) LL yy Ss RR Rr ll ss Yy

9. Use the information for SpongeBob’s traits to indicate the genotype(s) for each trait.
Dominant Gene
Recessive Gene
Body Shape
Squarepants (S)
Roundpants (s)
Body Color
Yellow (Y)
Blue (y)
Eye Shape
Round R)
Oval r)
Nose Style
Long (L)
Stubby (l)
Yellow body =
Roundpants =
Oval eyes =
Long nose =
Stubby nose =
Round eyes =
Squarepants =
Blue Body =

10. TT Bb DD Ff tt dd Dd ff Tt bb BB FF
Scientists at Bikini Bottoms have been investigating the genetic makeup of the organisms in this community. Complete each section.
For each genotype below, indicate whether it is a heterozygous (He) OR homozygous (Ho). TT Bb DD Ff tt dd Dd ff Tt bb BB FF

11. SpongeBob loves growing flowers for his pal Sandy!
Her favorite flowers, Poofkins, are found in red, blue, and purple. Use the information provided and your knowledge of incomplete dominance to complete each section.
Identify the correct genotype for each flower color below if R represents a red gene and B represents a blue gene.
Red = Blue = Purple =
What would happen if SpongeBob crossed a Poofkin with red flowers with a Poofkin with blue flowers? Complete the Punnett Square to determine the chances of each flower color.
How many of the plants would have red flowers?
How many of the plants would have purple flowers?
How many of the plants would have blue flowers? % % %

12. What would happen if SpongeBob crossed two Poofkins with purple flowers? Complete the Punnett Square and probabilities below.
How many of the plants would have red flowers?
How many of the plants would have purple flowers?
How many of the plants would have blue flowers? % % %
What would happen if SpongeBob crossed a Poofkin with purple flowers with a Poofkin with blue flowers? Complete the Punnett Square and probabilities below.
How many of the plants would have red flowers?
How many of the plants would have purple flowers?
How many of the plants would have blue flowers? % % %