Which of the following diseases is caused by a single mutated gene?
a. sickle cell anemiab. diabetesc. cancerd. turner syndrome

The correct answer here is that A) Sickle Cell Anemia is caused by a mutated gene. An outline description of this condition is that it is a disease caused by the autosomal recessive single gene. This is a defect in the beta chain of the bloods hemoglobin in a complex disease, which impacts particular ethnic groups.