Match column 1 with column 2 :
| COLUMN 1 | COLUMN 2 |
| A. Turner's syndrome | i. Trisomy |
| B. Linkage | ii. AA + XO |
| C. Haemophilia | iii. Morgan |
| D. Down's syndrome | iv. X linked |
Answer & explanation
Correct answer: option 4
The correct answer is Option (4)- A-ii, B-iii, C-iv, D-i
| COLUMN 1 | COLUMN 2 |
| A. Turner's syndrome | ii. AA + XO |
| B. Linkage | iii. Morgan |
| C. Haemophilia | iv. X linked |
| D. Down's syndrome | i. Trisomy |
Here's the matching of items in Column 1 with their corresponding items in Column 2:
A. Turner's syndrome - ii. AA + XO
Explanation: Turner's syndrome is caused due to the absence of one of the X chromosomes, i.e., 45 with X0, Such females are sterile as ovaries are rudimentary besides other features including lack of other secondary sexual characters
B. Linkage - iii. Morgan
Explanation: The concept of linkage in genetics was extensively studied by Thomas Hunt Morgan, particularly in his work with fruit flies (Drosophila).
C. Haemophilia - iv. X linked
Explanation: Hemophilia is a genetic disorder caused by a mutation in genes on the X chromosome and is inherited in an X-linked recessive manner.
D. Down's syndrome - i. Trisomy
Explanation: Down syndrome results from an extra copy of chromosome 21, known as trisomy 21, where there are three copies of chromosome 21 instead of the usual two.