If the HLA was polymorphic (exactly as it is) but hypothetically not polygenic, then how many different classical class I MHC isoforms would we each express? (thes "classical" class I are the only class I that we discussed at class) A. one B. one or two C. three D. three to six E. six The gray mouse (lower, center) is the offspring of the two inbred mice shown above it. A transplant in which direction (arrow) is expected to succeed without immune rejection? Indicate any/all correct answers. As you may know, the Moderna and Pfizer mRNA vaccines contain no SARS- CoV-2 proteins--just lipids and mRNA that encodes the SARS-CoV-2 spike protein. Would you expect these vaccines to activate both class I and class II restricted T cells? A. no, mRNA could only produce antigen for class I restricted T cells B. no, mRNA could only produce antigen for class II restricted T cells C. yes, mRNA would quickly produce antigen for class I restricted T cells and, over days (much longer than the Morrison/Braciale tests), antigen released from cells making it would provide antigen for class II restricted T cells..