Question

A child has blood group '$O$'. If father has blood group '$A$' and mother has blood group '$B$', work out the genotypes of the parents.

• A. $I^AI^A$ and $I^Bi$
• B. $I^Ai$ and $I^Bi$
• C. $I^Ai$ and $ii$
• D. $ii$ and $I^BI^B$

Answer 1

Answer: (B)

If father has blood group '$A$', mother has blood group '$B$', and the child with blood group '$O$' appears in progeny, this means that the parents are heterozygous.