Final answer:
The genotype and phenotype ratios of offspring from a man with AB blood and a woman with type O blood are both 1:1, for type A or B blood respectively. The type O woman can donate to her AB husband as type O is a universal donor.
Step-by-step explanation:
The potential offspring of a man with type AB blood and a woman with type O blood will have specific genotype and phenotype ratios. The man with AB blood can produce sperm with either the A or B allele since the genotype is IAIB. The woman with type O blood has the genotype ii and can only produce eggs with the i allele. Therefore, the possible genotypes for the offspring are IAi (type A blood) or IBi (type B blood).
The genotype ratio will be 1:1, meaning that there's a 50% chance for each child to inherit type A blood and a 50% chance to inherit type B blood. The phenotype ratio for blood type will also be 1:1, with half of the potential offspring having type A blood and the other half having type B blood.
As to whether the woman can donate blood to her husband, the answer is yes. A person with type O blood is a universal donor and can donate to any blood type, including type AB blood.