Bikini Bottom Genetics Review
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4Bikini Bottom Genetics Review
Name ___________________________
1. Use your notes to complete each definition.
Purebred - Also called ______________________ and consists of gene pairs with genes that are the __________.
Hybrid - Also called _____________________ and consists of gene pairs with genes that are ________________.
Genotype is the actual ___________ makeup represented by _______________.
Phenotype is the ________________ appearance of a trait, such as a _________________ body color.
2. Classify each of the following gene pairs as heterozygous (He) or homozygous (Ho).
TT ______
Bb _____
dd _____
Ff _____
Rr _____
Characteristic
Dominant Gene
Recessive Gene
3. Give the possible genotypes for each trait based on the
Body Shape
Squarepants (S)
Roundpants (s)
information provided in the chart.
Body Color
Yellow (Y)
Blue (y)
Eye Shape
Round (R)
Oval (r)
Purebred squarepants - ______
Blue body - ______
Hybrid round eyes - ______
Purebred roundpants - ______
Heterozygous squarepants - ______
Homozygous yellow body - _____
4. Give the phenotypes for each genotype based on the information provided in the chart.
SS - __________________
Yy - _________________
rr - __________________
Rr - __________________
ss - __________________
YY - __________________
5. Spongebob's cousin, SpongeJimBob, is a heterozygous yellow sponge. He recently married a blue sponge gal.
Create a Punnett square to help you answer the questions.
What are the possible genotypes and phenotypes for the offspring?
What percentage would be yellow? ______ %
What percentage would be blue? ______ %
6. SpongeJimBob has oval eyes, while his bride is believed to be homozygous for her round eye shape. Create a
Punnett square to help you answer the questions.
What are the possible genotypes and phenotypes for the offspring?
What percentage would have round eyes? ______ %
What percentage would have oval eyes? ______ %
T. Trimpe 2006
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