Blood type alleles exhibit CO-DOMINANCE Allele lA encodes the A antigen on the o
ID: 252490 • Letter: B
Question
Blood type alleles exhibit CO-DOMINANCE Allele lA encodes the A antigen on the outside of red blood cells. Allele IB encodes the B antigen. Allele i encodes neither, and is recessive. Here are the possible genotypes and phenosypes someone could have for blood type: AIA-Type A IAi -Also type A, because i is recessive IBIB- Type B IBi Also type B, because i is recessive AIB - Type AB (co-dominant, both antigens are present) i -Type O (neither A nor B are expressed) Now, imagine that a woman is Type A, and that she gives birth to a child with Type O blood. We don't know the father's blood type...but what COULD the father's blood type be? O Father could only be AB. Father could NOT be A B or o. Father could be A, B or O, Father could NOT be AB. O Father could be any blood type (A, B. AB or o) O its not actually possible for a Type A woman to have a child who is Type O O Father could only be O. Father could NOT be A, B or AB.
Explanation / Answer
father with any possible blood group with recessive i allele can have baby of O blood group. so father with AB blood group do not have any recessive i allele hence the baby do not have O blood group. a father with blood group IAi, IBi or ii (O blood group) have chance of baby with O blood group. so the answer is
father could be A, B or O but father could not be AB