Answer
3. a
Each person gets a different complement of genes from parents, but some of the inherited genes may be similar among individuals. People who inherit similar genes are likely to have the same immune strengths and weaknesses.
Work Step by Step
3. b
The MHC proteins bind to various part antigens and present them to T-cells for destruction.
3.c. Previous response to antigens.
MHC (I and II) means major histocompatability complex.
