Question

Statement 1: Polygenic disorders arise due to mutation in multiple genes.

Statement 2: Sickle-cell anaemia is a polygenic disorder.

• A. Only statement 1 is true
• B. Only statement 2 is true
• C. Both the statements are true
• D. Both the statements are false

Answer 1

The correct option is A Only statement 1 is true

• Polygenic disorder arises due to mutations in multiple genes. Common examples of such disorders are diabetes, blood pressure, heart disorders, asthma, obesity, etc.
• Sickle-cell anaemia, on the other hand is a monogenic disorder which arises due to a mutation in the gene that codes for haemoglobin.