Final answer:
MHC expression is codominantly inherited from both parents, meaning that the alleles from both the mother and the father contribute to the individual's phenotype in an equal manner. This is a fundamental aspect of immune system function and important in organ transplantation.
Step-by-step explanation:
The correct answer to the statement is true. MHC expression is indeed codominant from both sets of inherited alleles. In humans, the three highly polymorphic MHC I genes (HLA-A, HLA-B, and HLA-C) each have numerous alleles that exist within the population. When an individual expresses their MHC genes, they express two alleles for each gene (one inherited from each parent), and these alleles are expressed codominantly. This means that both alleles contribute to the overall MHC phenotype of the individual, which is crucial for immune function and organ transplant compatibility. A classic example of codominance occurs in the ABO blood group system, where individuals with the AB blood type express both A and B antigens equally. This concept also explains the complexity and necessity of finding a close genetic match for organ transplants, as a matching MHC genotype between donor and recipient significantly reduces the risk of organ rejection.