What is the genotype of a person with type A blood, who had a father with type O blood?

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

A roan cow shows co-dominance in fur color (red and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

A bubble guppy with a yellow tail has offspring with a bubble guppy with a red tail. The offspring have orange tails. What is this an example of?

The trait that will be expressed only if two copies of the allele are present.

Which of the following is heterozygous?

Which of the following is homozygous recessive?

The Punnett square above illustrates a dihybrid cross for cats. The traits are long tail (s), short tail (S), brown hair (B), and white hair (b). What are the genotypes of the parents that produces the probabilities shown in the Punnett square above?

Hemophilia is a recessive x-linked disorder. Which genotype represents a female who is a carrier for haemophilia?

H= normal blood clotting

h=haemophilia

What is the probability that any of the offspring will have haemophilia in a cross between the two individuals below?

X^HX^h x X^HY

The individual represented here is ...

What percentage of the male offspring will have this recessive disease?