ABO Story A The ABO blood type system is based on glycolipids at the surface of Red Blood Cells The H antigen is synthesized by

Question

ABO Story A The ABO blood type system is based on glycolipids at the surface of Red Blood Cells The H antigen is synthesized by an enzyme encoded by the H gene which has two alleles The typical H allele is dominant while the recessive h allele encodes for a null mutation Homoygotes for the h allele hh do not express the H antigen on their Red Blood Cells The I gene with its two codominant 1 and 1 alleles further modify the H antigen while the i allele leaves it as is A man with blood type A whose mother was blood type O has children with a woman that has blood type AB The man and the woman are also heterozygous for the H gene Which of the following pedigrees describe the phenotypes of the members of the family in question ABH ABH ABH OH AH AH 2 AH ABH 2 OH AH OH ABH BH

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