A Bone Marrow Transplant May Not Be Appropriate from a Given

Multiple Choice

A bone marrow transplant may not be appropriate from a given donor (Jane) to a given recipient (Jane's cousin, Bob) , even though Jane has previously given blood for one of Bob's needed transfusions, because ________.

A) even though Jane's blood type is a match to Bob's, her major histocompatibility (MHC) proteins may not be a match
B) a blood type match is less stringent than a match required for transplant because blood is more tolerant of change
C) for each gene, there is only one blood allele but many tissue alleles
D) Jane's MHC class II genes are not expressed in bone marrow