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A+ B+ baby blood group is O- why??
M harshika patel female
My husband is B+ blood group and my blood group is A+ then why my baby blood group is O- ?
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The inheritance of blood type is based on mendelian genetics. For ABO blood typing, if you are A and your husband is B, there is 25%chance of your baby being O. This might be because your genotype would be AO and your husband's might be BO. So based on probability, 25%probability each of baby being A, B, AB or O.
Similarly for Rh factor inheritance, assuming you both were Rr, you have 25% chance for RH negative baby.
To conclude.. its possible for a A+ and B+ couple to have O- baby. You are proud parents of a universal donor. Relax!
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