Surgery A 46 year-old man is on a waiting list to secure a renal transplant. The genetic locus of transplant antigens in humans is known as which? A Rhesus (Rh) B Ig (Immunoglobulin) A and IgM C Human leukocyte antigen (HLA) D ABO 💡 Explanation A 46 year-old man is on a waiting list to secure a renal transplant. The genetic locus of transplant antigens in humans is known as which? ✓ Correct Answer: C. Human leukocyte antigen (HLA)