Variation in RBC Count

Q.

An abnormal increase in the number of RBC is called

1. leukaemia

2. polycythaemia

3. erythropenia

4. leukopenia

Q. Sickle cell anemia is :

1. Characterized by elongated sickle like RBCs with a nucleus
2. An autosomal linked dominant trait
3. Caused substitute of valine by glutamic acid in the beta globin chain of hemoglobin
4. Caused by a change in a single base pair of DNA