Answer:
1.) The father could be blood type O (genotype: oo), blood type A (genotype: Ao), or blood type B (genotype: Bo).
Explanation:
The woman is blood type A, but we know her genotype must be Ao (not AA) because she has a daughter with blood type O. That means the daughter got an o allele from each parent. That's why dad must have at least one o.
I only know 1.) sorry, but i hoped I helped a little bit.
