Question

Study the following and choose the correct statement: I. Sickle cell anemia is due to replacement of glutamic acid in 6th position by valine II. Thalassemia is sex linked disorder due to recessive genes III. Down syndrome is an allosomal disorder IV. Phenylketonuria is due to mutation of the gene-PAH in chromosome 12

• A. I and II
• B. II and IV
• C. I and III
• D. I and IV

Hint:

Down syndrome = Trisomy 21 (autosomal disorder). Phenylketonuria is caused by mutation in the PAH gene on chromosome 12.

Answer 1

The Correct Option is D