Match List I with List II
| List I | List II |
|---|---|
| A. Down's syndrome | I. 44+ XXY |
| B. Thalassemia | II. Autosomal recessive trait |
| C. Klinefelter's syndrome | III. 44+ XO |
| D. Turner's Syndrome | IV. 45 +XY/XX |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → A-IV, B-II, C-I, D-III
(A) Down's syndrome — this matches (IV) 45 +XY/XX. An extra chromosome 21 gives 45 autosomes plus the sex chromosomes, 47 in all.
(B) Thalassemia — this matches (II) Autosomal recessive trait. It is a Mendelian blood disease passed on when both parents are carriers.
(C) Klinefelter's syndrome — this matches (I) 44+ XXY. An extra X chromosome in a male.
(D) Turner's Syndrome — this matches (III) 44+ XO. One X chromosome is missing in a female.