Question

predict the blood groups of the offsprings when father A,and mother B are heterozygous

Answer 1

A parent with blood group A can have two possible genotype I^A I^O simarly parent with blood group B can have two possible genotypes--I^B I^{B }and I^OI^O

if both the parents are homozygous(I^AI^A* I^BI^{B )} all of their children will have AB blood grou

But if father is homozygous (I^AI^A) and mother is heterozygous(I^BI^O) the total different type of possible combination by 3 alleles (I^A,I^{B and} I^O) will be (I^A, I^{B and} I^BI^O)

Hence the predicted blood group of offsprings will be AB or B