Sickle cell anemia is

Read the following statements and choose the correct option. (i) In phenylketonuria the affected person does not secrete the enzyme to convert phenylalanine to tyrosine. (ii) The possibility of a male becoming haemophilic is extremely rare. (iii) Sickle cell anemia is caused by the substitution of glutamic acid by valine at the fifth position of beta chain of haemoglobin molecule. (iv) Myotonic dystrophy is an autosomal dominant trait.

Sickel cell anemia is the result of ____

Sickel cell anemia is :

Sickle cell anaemia is

Sickle cell anaemia is

Sickle cell anaemia is example of

Sickle cell anaemia is a type of -

Sickle cell anaemia is controlled by