Answer:
Olga has blood group type A with genotype IAi (heterozygous)
Step-by-step explanation:
First Marriage:
- 1st Husband-Type A (IAi) x Olga- Type A (IAi) = Child-Type O (ii)
Second Marriage:
- 2nd Husband-Type B (IBIB) x Olga- Type A (IAi) = Child-Type AB (IAIB)
Olga genotype is heterozygous (IAi) this is why her children are having different blood group types.