Tom with type AB blood marries Anna. They have two children: Eric with type B blood and Jessica with type A blood. Anna's father Paul has type O...

  Tom with type AB blood marries Anna. They have two children: Eric with type B blood and Jessica with type A blood. Anna's father Paul has type O blood, and her mother Elizabeth has type A blood.

 a. What are the genotypes of Tom and Paul?

b. What are the possible genotypes and phenotypes of Anna?

c. What is the genotype of Eric?

d. Is it possible to define Jessica's genotype and phenotype based on the information provided? Why or why not?