Dihybrid Crosses 1 - Cats - Chickens

Dihybrid Crosses
1. There is a cat that is homozygous black and homozygous for long ears. It is mated with a
cat that is homozygous black with white spots and heterozygous for long ears. If black
(B) is the dominate trait and long ears (L) is the dominate trait, what will the children
have a chance of being?
Mom = BB LL
Dad = bb Ll
Genotype: ______________________
Phenotype: __________________
2. There is a cat that is heterozygous black with white spots and homozygous for long ears.
It is mated with a cat that is heterozygous black with white spots and heterozygous for
long ears. If black (B) is the dominate trait and long ears (L) is the dominate trait, what
will the children have a chance of being?
Mom = Bb LL
Dad = Bb Ll
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: __________________