Final answer:
A universal donor in the blood typing system has type O negative blood, while a universal recipient has type AB positive blood.
Step-by-step explanation:
A universal donor in the blood typing system is someone with type O negative blood. This type of blood does not have A or B antigens on the erythrocyte surface and can be donated to individuals with any blood type. On the other hand, a universal recipient is someone with type AB positive blood. They have both A and B antigens on their erythrocytes and can theoretically receive blood from any ABO blood type without producing anti-A or anti-B antibodies.