1. Who discovered that all human being fall into four principal blood groups according to their compositions?

2. BB , BO genotype belongs to which phenotypes?

3. Genotype combinations are __ in numbers.

4. The heredity of blood group is fully known?

5. AA and AO genotype belongs to which phenotypes?

6. What is Erythrocytes?

7. The plasma is a coagulable fluid, containing a variety of substances like fibrinogen

8. What is leukocytes?

9. Blood also help in removing the waste products of metabolic activities.

10. The allelic genes which can occupy the same locus on a certain chromosome are not responsible for hereditary mechanism.