The number of alleles controlling blood groups in humans? by Sunday | Sep 7 | Biology JAMB | 0 comments A. 3 B. 4 C. 5 D. 2 Correct Answer: Option A – 3 Users Also Read These:A person with blood group B can only donate blood to…What is the probability of producing a child of…An individual with blood group AB can receive blood…During blood transfusion, agglutination could be…What is the probability? of a man of blood group AB…