Codominant and incompletely dominant traits have three phenotypes instead of two. How many alleles (versions of the gene) are involved?

In a certain breed of cattle, both red and white hairs show up together. This is an example of which type of inheritance pattern?

What is the genotype that should be in the blank square?

Two alleles for flower color in snapdragons are red and yellow. When a red flower is crossed with a yellow flower, all of the offspring have orange flowers. What kind of inheritance does this illustrate?

Being able to roll your tongue is a dominant trait and not being able to roll your tongue is a recessive trait.  This trait is determined by complete dominance.  If a mom with the genotype “rr” has a child with a dad with the genotype “Rr”, what is the probability that their child will be able to roll its tongue?

In snapdragons, flower color is determined by incomplete dominance. The two alleles are red (A) and white (a). The heterozygous genotype is expressed as pink. If two pink flowered plants are crossed, what is the probability of the offspring having red flowers?

In some chickens, the gene for feather color is controlled by co-dominance. The allele for black feathers is B and white feathers is W. The heterozygous genotype is known as erminette. Erminette chickens will look “spotted” with both black and white feathers.  If a black chicken and a white chicken are crossed, what is the probability of having an Erminette chicken?

In humans, hair texture exhibits incomplete dominance. The gene for curly hair (H) is incompletely dominant to the gene for straight hair (h). Individuals that are heterozygous have wavy hair.  If two heterozygous parents have a child, what is the chance that the child will have wavy hair?

Blood type in humans depends on three alleles. The A and B alleles are codominant, and the O allele is recessive.  An AB blood type mother has children with a B blood type father (genotype BO).  What are the chances that their children will have AB type blood?