Several genes in humans in addition to the ABO gene(I) give rise to recognizable antigens on the surface ofred blood cells. The MN and Rh genes are two examples. The Rh locus can contain either a positive or anegative allele, with positive being dominant to negative. M and N are codominant alleles of the MN gene.The following chart shows several mothers and theirchildren. For each mother-child pair, choose the fatherof the child from among the males in the right column, assuming one child per male.Mother Child Malesa. O M Rh(pos) B MN Rh(neg) O M Rh(neg)b. B MN Rh(neg) O N Rh(neg) A M Rh(pos)c. O M Rh(pos) A M Rh(neg) O MN Rh(pos)d. AB N Rh(neg) B MN Rh(neg) B MN Rh(pos)
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.
The following chart shows several mothers and their
children. For each mother-child pair, choose the father
of the child from among the males in the right column, assuming one child per male.
Mother Child Males
a. O M Rh(pos) B MN Rh(neg) O M Rh(neg)
b. B MN Rh(neg) O N Rh(neg) A M Rh(pos)
c. O M Rh(pos) A M Rh(neg) O MN Rh(pos)
d. AB N Rh(neg) B MN Rh(neg) B MN Rh(pos)
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