Question

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? ______ %

Answer 1

Assume the yellow gene is represented by Y, while the blue gene is represented by y

Y y

Y YY Yy

y Yy yy

This shows that 75% of the offspring will be yellow due to the dominant Y gene, while 25% of the offspring will be blue, due to the recessive y.

-M