In cattle, the polled or hornless characteristic is dominant over the horned trait. In snapdragons normal flower shape is dominant over the peloric or snap shape.
Flower color is determined by a pair of alleles which are located on a different chromosome.
In fruit flies white eyes are determined by a sex-linked recessive allele, and vestigial wings are caused by an autosomal recessive allele. A woman who has just had a baby accuses a particular man of being the father of her baby, and she sues him for child support. Two babies were born in the same hospital just before a power failure. The parents feared that in the confusion the babies might have been interchanged. Mr. and Mrs. Green had blood types AB and B, respectively.