Dihybrid Crosses II: Dogs & Chickens

Dihybrid Crosses 2
1. In a breed of dogs, Brown fur is dominant and yellow fur is recessive. In addition, they
can have fluffy tails, which is dominant or thin haired tails, which is recessive. If you
cross a heterozygous brown fur dog with a heterozygous fluffy tail with a homozygous
brown dog with a homozygous recessive tail. What would the children look like?
Mom: ____________________
Dad: ___________________________
Genotype: _______________________ Phenotype: ________________________
2. Using the same information from above, if a dog that is homozygous brown with a
homozygous fluffy tail that is crossed with a homozygous brown dog with a heterozygous
fluffy tail. What would the children look like?
Mom: _________________________
Dad: _________________________
Genotype: __________________________
Phenotype: ______________________

3. Chickens are dominate white (W) and recessive is speckled (w). They typically have
yellow beaks, which are the dominant trait (Y); the recessive trait shows up as orange (y).
If you cross a heterozygous white chicken with a heterozygous yellow beak with another
chicken that is exactly the same genotype, what will the offspring look like?
Mom = Dad =
Genotype: ______________________
Phenotype: __________________
4. Chickens are dominate white (W) and recessive is speckled (w). They typically have
yellow beaks, which are the dominant trait (Y); the recessive trait shows up as orange (y).
If you cross a homozygous speckled chicken with a homozygous yellow beak with
another chicken that is homozygous white with a homozygous orange beak, what are the
possible offspring?
Mom = Dad =
Genotype: ______________________
Phenotype: __________________