Question

A woman with blood group 'O' has a child with blood group 'O'. Father with blood group 'A' must have the genotype _____________.

• A. $I^O{I}^O$
• B. $I^A{I}^B$
• C. $I^A{I}^O$
• D. $I^B{I}^O$.

Answer 1

The correct option is C $I^A{I}^O$

Blood group of mother is ‘O’ and her genotype is I^OI^O. Father blood group is ‘A’ and his genotype is I^AI^O. The blood group of children are either ‘A’ or ‘O’.

So, the correct option is ‘I^AI^O’.