Sickle cell anaemia is:
1. | an autosomal linked dominant trait |
2. | caused by substitution of valine by glutamic acid in the globin chain of haemoglobin |
3. | caused by a change in base pair of DNA |
4. | characterized by elongated sickle like RBCs with a nucleus |
Sickle cell anaemia has not been eliminated from the African population because:
1. It is controlled by recessive genes
2. It is not a fatal disease
3. It provides immunity against malaria
4. It is controlled by dominant genes
Both sickle cell anaemia and Huntington’s chorea are:
1. bacteria-related diseases.
2. congenital disorders
3. pollutant-induced disorders
4. virus-related diseases