Final answer:
The goal of positive and negative selection in the thymus is the removal of self-antigen-specific T cells, helping to prevent autoimmune responses and ensure functional T cells are released into the bloodstream.
Step-by-step explanation:
The goal of the processes of positive and negative selection in the thymus is the removal of self-antigen-specific T cells. Positive selection ensures that T cells recognize and bind to MHC molecules, while negative selection eliminates T cells that recognize self-antigens. These processes help to prevent autoimmune responses and ensure that only functional T cells are released into the bloodstream.