Punnett Squares for Two Trait (Dihybrid) Crosses

Use the following information to answer the following questions

TRAIT

DOMINANT ALLELE

RECESSIVE ALLELE

Teeth Color

Orange (T)

Green (t)

Coat Color

Tan (F)

Purple (f)

Tail Length

Long (L)

Stubby (l)

1. Set up and fill in a punnett square representing the cross of a heterozygous orange tooth, heterozygous long tail with a heterozygous orange tooth, heterozygous long tail.

Genotype

Phenotype

2. Set up and fill in a punnett square representing the cross of a homozygous orange tooth, homozygous long tail with a heterozygous orange tooth, stubby tail.

Genotype

Phenotype

3. Set up and fill in a punnett square representing the cross of a green tooth, heterozygous tan coat with a green tooth, heterozygous tan coat.

Genotype

Phenotype

4. Set up and fill in a punnett square representing the cross of a heterozygous long tail, heterozygous tan coat with a heterozygous long tail, heterozygous tan coat.

Genotype

Phenotype




5. What do you notice between the answers to numbers 1 and 4. What is similar about the two types of animals being crossed?

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