Bikini Bottom

Name ______________________________ Period _______ Date ____________


SpongeBob Genetics
© T. Trimpe http://sciencespot.net/

1. For each genotype below, indicate whether it is a heterozygous (He) OR homozygous (Ho).

TT _____ Pp _____ dd _____ Ff _____ Tt _____ FF _____

Which of the genotypes listed above would be considered purebred?_____________________

2. In Squidward’s family, a blue body color (B) is dominant to green (b). Determine the phenotype for each genotype below based on this information.


BB _________________ Bb _________________ bb ___________

3. If tall eyeballs (T) are dominant to short eyeballs(t), give the genotypes that are possible for members of Mr. Krabbs’ family.Tall eyeballs = ________________ Short eyeballs = ____________________

4. SpongeBob is known for his big round eyes (R), which is dominant over an oval eye shape (r). If he is heterozygous for his round eye shape and marries a woman with oval eye shape, what type of eyes might the kids have?

A. List the genotypes for each:

Heterozygous round eyes - _______Oval eyes - _______

B. Complete the Punnett square to show the possibilities that would result if SpongeBob had children with an oval-eyed woman.




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C. List the possible genotypes and phenotypes for their children.





D. What are the chancesof a child with a round eye shape? ____%

E. What are the chances of a child with an oval eye shape? ____%


5. Patrick recently married Patti, a cute girl he met at a local dance. He is considered a purebred for his tall head shape (T), which is dominant over a short head (t). If Patti is a short-headed woman, what type of heads would their children have?A. List the genotypes for each: Patrick - ______ Patti - _______


B. Complete the Punnett square to show the possible offspring.





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C. Which type of head is most likely: tall or short? Explain.






D. Would the children beconsidered purebreds? Explain.







Use your knowledge of genetics to complete these questions:

1. Use the information for SpongeBob’s traits to write 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 |








(a) LL-______________
(b) yy-_______________
(c) Ss-_______________
(d) RR - _____________
(e) Rr-_______________
(f) ll- _______________
(g) ss- _______________
(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)...