Match List I with List II : Choose the correct answer from the options given below :
- A-I, B-II, C-III, D-IV
- A-II, B-III, C-IV, D-I
- A-III, B-IV, C-I, D-II
- A-IV, B-I, C-II, D-III
Answer
(3) A-III, B-IV, C-I, D-II
Solution
A. Down's syndrome is due to trisomy of the 21st chromosome (A-III).
B. -thalassemia is controlled by two closely linked genes HBA1 and HBA2 on chromosome 16 (B-IV).
C. -thalassemia is controlled by a single gene HBB on chromosome 11 (C-I).
D. Klinefelter's syndrome (47, XXY) is due to an additional copy of the X chromosome (D-II).
Thus, A-III, B-IV, C-I, D-II.
Answer: (3)