If a woman is homozygous for type A blood and her husband is type O, what is the probability that their offspring would have any one of the 4 possible blood types.

Answer:
The offspring would have type A blood group.
The genotype of mother would be [tex]I^{A}I^{A}[/tex] (homozygous type A blood group).
Thus, she will produce only one type of gamete that is, [tex]I^{A}[/tex].
Similarly, the genotype of a the father would be ii (type O blood group).
He will also produce only one type of gamete that is, i.
The cross would produce offspring with genotype [tex]I^{A}i[/tex].
Thus, the offspring would have only type A blood group.
Hence, the probability of having blood group A would be 100% and probability of having other blood group (B, AB or O) would be zero %.