SpongeBob Genetics

Explore genetics with SpongeBob! Practice Punnett squares & understand heredity.

1.For each genotype below, indicate whether it is a heterozygous (He) OR homozygous (Ho). TT Ho Bb He DD Ho Ff He tt Ho dd Ho 2. Determine the phenotype for each genotype using the information provided about SpongeBob. Yellow body color is dominant to blue. YY Yellow Yy Yellow yy BlueSquare shape is dominant to round. SS Square Ss Square ssRound 3. For each phenotype, give the genotypes that are possible for Patrick. A tall head (T) is dominant to short (t). Tall = TT and Tt Short = ttPink body color (P) is dominant to yellow (p). Pink body = PP and Pp Yellow body = pp 4. SpongeBob Squarepants just met SpongeSusie Roundpants at a dance. SpongeBob is heterozygous for his square shape, but SpongeSusie is round. Fill in the Punnett square to show the genes they would pass if they were ever to have children. Body shape:Square = SRound = s Ss ss Ss ss Using the information from your Punnett Square, answer the following questions. A. List the possible phenotypes for their children next to each genotype.Ss= square and ss= roundB. What are the chances of a child with a square shape? 50%C. What are the chances of a child with a round shape? 50 % 5. Patrick met Patti at a dance. Both of them were heterozygous for their pink body color, which is dominant over yellow color. Fill in the Punnett Square below to show the possibilities that would result if Patrick and Patti had kids. Body color:P = pinkp = yellow p p Pp pp Pp pp A. List the possible genotypes for their children. PP Pp ppB. What are the chances of a child with a pink body? 75 %C. What are the chances of a child with a yellow body? 25 % 6. Everyone in Squidward’s family has light blue 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 green 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. Put the bride (green) across the top! b b B B Bb Bb Bb Bb A. List the possible genotype(s) for their children. BbB. What are the chances of a child with light blue skin? 100 %C. What are the chances of a child with light green skin? 0 %D. Would Squidward’s children still be considered purebreds? No EXTRA CREDIT CHALLENGE!!!Mr. Krabbs and his wife recently had a Lil’ Krabby, but it has not been a happy occasion for them. Mrs. Krabbs has been upset since she first saw her new baby, who had short eyeballs. She claims that the hospital goofed and mixed up her baby with someone else’s baby. Mr. Krabbs is homozygous for his tall eyeballs, while his wife is heterozygous for her tall eyeballs. Some members of her family have short eyes, which is the recessive trait. Place Mrs. Krabbs' genotype along the top of the Punnett Square. T t T T TT Tt TT Tt A. Did the hospital make a mistake? YesB. What genotype(s) are possible for Lil' Krabby to inherit? TT Tt