Punnett Square Practice
In dogs, there is a gene for fur color. A dominant allele (B) causes dogs to have black fur. A
recessive allele (b) causes dogs to have brown fur.
If a heterozygous black dog is crossed with a brown dog, what % of the offspring will have black
fur? Answer by completing the following steps:
a.) Parents genotypes
b.) Punnett square
c.) Genotypic ratio
d.) Phenotypic ratio
e.) What do the letters B and b actually represent?
