Several genes in humans in addition to the ABO gene (I ) give rise to recognizable antigens on the surface of red blood cells. The MN and Rh genes are two examples. The Rh locus can contain either a positive or a negative allele, with positive being dominant to negative. M and N are codominant alleles of the MN gene. Suppose a child's blood type is B MN Rh(neg). The mother's blood type is O N Rh(neg). Check all of the blood types below that the father could have. (Assume no involvement of the Bombay phenotype; everyone is HH). A. O M Rh- O M Rh -
B. B MN Rh+ B MN Rh+
C. A M Rh+ A M Rh+
D. O MN Rh+ O MN Rh+
E. B MM Rh+ B MM Rh+
F. B NN Rh-

Option B and E

Explanation:

Since the child's blood type is

B (BB or BO) MN Rh(neg)

The mother's bloodtype is

O (OO) N (NN) Rh(neg)

To produce a child with the B bloodtype when mother is OO, the father has to have either one or two copies of the B bloodtype (BB or BO).

To also produce a child with MN Bloomington when mother is NN, the father has to have either the M (MM) bloodtype or the MN bloodtype.

Thus, the father's bloodline could be

B M bloodtype Rh(+)

Or

B MN bloodtype Rh(+)

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