Question

Match list-I with list-II and select the correct answer using the code given below:
List-I (Syndrome) List-II (Chromosomal abnormality)
(1) Patau's syndrome (A) 44 + XXY = 47

(2) Klinefelter's syndrome (B) 44 + XO = 45
(3) Down's syndrome (C) 46 + 1 = 47, (trisomy 13)

(4) Turner's syndrome (D) 46 + 1 = 47, (trisomy 21)

• A. 1234 - ABCD
• B. 1234 - DCBA
• C. 1234 - CBDA
• D. 1234 - CADB

Answer 1

Answer: (D)

1234 - CADB

• Patau's syndrome – It is caused by trisomy of chromosome 13, i.e. - 46 + 1 = 47, chromosome 13 trisomy.
• Klinefelter’s syndrome - The syndrome is represented as XXY where males have an extra X chromosome, i.e.- 44 + XXY = 47.
• Down's syndrome - It is caused by trisomy of chromosome number 21, i.e., 46 + 1 = 47, chromosome 21 trisomy.
• Turner's syndrome - This syndrome occurs due to a missing X chromosome and is written as XO.

So the correct option is D.