Q. A woman is married for the second time. Her first husband was ABO blood type A, and her child by that marriage was type O. Her new husband is type B and their child is type AB. What is the women’s ABO genotype and blood type?
A) $I^{A}\ I^{O};Blood\ type\ A$
B) $I^{A}I^{B};Blood\ type\ AB$
C) $I^{B}I^{O}\ ;Blood\ type\ B$
D) $I^{O}I^{O}\ ;Blood\ type\ O$
Explanation
Blood groups are inherited from our biological parents in the same way as eye colour and other genetic traits. Within the ABO blood group system, the A and B genes are codominant, i.e., these will be expressed whenever the gene is present. The O gene is silent and only expressed when neither A nor B is present.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.