Question

'O' group mother with 'O' group child abuses 'AB' group man for fathership of child. Select the statement that is true regarding this?

• A. The claim is correct
• B. Father is true but mother is not
• C. Both parent are false
• D. Mother is true but the father's claim is wrong

Answer 1

Answer: (D)

In ABO blood group system is an example of multiple allelism. In which 3 alleles are present as A, B, and O. A and B alleles are dominant while allele O is recessive. Blood group AB can be expressed only in heterozygous condition while blood O is expressed only in homozygous condition. So, If an offspring has an O blood group, then in his parents blood group AB is not possible.