*****BONUS********** 1. What is the null phenotype? (2 point…

*****BONUS********** 1. What is the null phenotype? (2 points) 2. Define “massive transfusion”. (2 points) 3. Which ABO type (in red cell transfusion) is the “universal donor”? (1 point) 4. Which ABO type (in red cell transfusion) is the “universal recipient”? (1 point)