Apply What You’ve Learned                                Name__________________ Period_________

  1. Choose two animal phenotypes. For example, you might pick tail length and clawed feet.

Write your choice of phenotypes here:

  1. Create the genotypes for your choices. For example, for genotype 1, I could choose long tails as dominant, so my genotype could be TT for homozygous dominant or Tt for heterozygous recessive. A short tail would have a  genotype of tt. For genotype 2, clawed feet could  be dominant, so the genotype would be Cc or CC. For the recessive trait to be seen, the genotype would be cc.

        List your genotypes here for each phenotype.


Traits Expressed



Homozygous Dominant

Heterozygous Dominant

Homozygous Recessive



  1. Create a Punnett Square to illustrate the law of dominance for each of your phenotypes. Work the squares, then write the percentages of each phenotype expressed.



        Explain how this match illustrates the law of dominance.

        How do these punnett squares also demonstrate the law of segregation? Use your notes on

        this law for help.

  1. Create a dihybrid cross to demonstrate the law of independent assortment. For example, I would cross my hybrids, TtCc x TtCc, animals with long tails and claws. Use your notes for help.

        Explain how this example demonstrates the law of independent assortment.

  1. Draw below a human caricature with the animal traits you chose. Include the answer to your last question in your picture.

        If either of these traits had evolved in humans, how do you think our lives would be different?

        For example, if humans had clawed feet and long tails, we could be carnivores, always

        hunting our prey! uj