IAT IISER2026BiologyBody Fluids and Circulation
For which one of the following parents, their children will NOT have the same blood group phenotype as either of the parents?
Options
- AFather: AB; Mother: A
- BFather: A; Mother: O
- CFather: AB; Mother: O
- DFather: O; Mother: B
Correct answer
C. Father: AB; Mother: O
Step-by-step solution
The blood group of an individual is determined by the alleles I^A , I^B , and i . For the parents in the first case: Father has blood group AB, so his genotype is I^A I^B . Mother has blood group O, so her genotype is i i . During gamete formation, the father produces gametes with either I^A or I^B alleles, and the mother produces gametes with only the i allele. The possible genotypes of their children will be: I^A i (Blood group A) I^B i (Blood group B) The phenotypes of the children are A and B, whereas the pheno