Bikini Bottom Genetics 2

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Bikini Bottom Genetics 2
Name __________________________
Use your knowledge of genetics to complete this worksheet.
1. Use the information for SpongeBob’s traits to write the phenotype (physical appearance) for each item.
(a) LL-______________
(e) Rr-_______________
Trait
Dominant Gene
Recessive Gene
Body Shape
Squarepants (S)
Roundpants (s)
(b) yy-_______________
(f) ll- _______________
Body Color
Yellow (Y)
Blue (y)
(c) Ss-_______________
(g) ss- _______________
Eye Shape
Round (R)
Oval (r)
Nose Style
Long (L)
Stubby (l)
(d) RR - _____________
(h) Yy -______________
2. Use the information in the chart in #1 to write the genotype (or genotypes) for each trait below.
(a) Yellow body - ___________
(e) Stubby nose - ___________
(b) Roundpants - ___________
(f) Round eyes - ____________
(c) Oval eyes - ______________
(g) Squarepants - ___________
(d) Long nose - _____________
(h) Blue body - ____________
3. Determine the genotypes for each using the information in the chart in #1.
(a) Heterozygous round eyes -_____
(c) Homozygous long nose - ______
(b) Purebred squarepants - ______
(d) Hybrid yellow body - ______
4. One of SpongeBob’s cousins, SpongeBillyBob, recently met a cute squarepants gal, SpongeGerdy, at a
local dance and fell in love. Use your knowledge of genetics to answer the questions below.
(a) If SpongeGerdy’s father is a heterozygous squarepants and her mother is a
roundpants, what is her genotype? Complete the Punnett square to show the
possible genotypes that would result to help you determine Gerdy’s genotype.
What is Gerdy’s genotype? _________
(b) SpongeBillyBob is heterozygous for his squarepants shape. What is his genotype? ________
(c) Complete the Punnett square below to show the possibilities that would result if Billy Bob & Gerdy had
children.
(d) List the possible genotypes and phenotypes for the kids.
(e) What is the probability of kids with squarepants? _____ %
(f) What is the probability of kids with roundpants? _____ %
Worksheet created by T. Trimpe 2003

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