A) bacteria-related diseases
B) congenital disorders
C) pollutant-induced disorders
D) virus-related diseases
Correct Answer: B
Solution :
Both sickle cell anaemia and Huntingtons chorea are congenital genetic disorders. Sickle cell anaemia was first reported by James Herrick (1904). In this disease, the patients haemoglobin level reduced to half of the normal and the RBCs becomes sickle- shaped. A single mutation in a gene can cause sickle cell anaemia. Huntingtons chorea is caused by autosomal mutation. Which is dominant. The gene is present on chromosome numbers.
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