Question Detail
Question
Which of the following is not a chromosomal disorder?
Correct Answer
Option C is the correct answer.
Detailed Explanation
Sickle cell anemia is a genetic disorder caused by a point mutation in the hemoglobin gene (a single nucleotide substitution), not by an abnormality in chromosome number or structure. Down syndrome (trisomy 21), Klinefelter syndrome (XXY), and Turner syndrome (XO) are chromosomal disorders.
Hint
It's a molecular disease caused by a specific gene mutation.