Match List -I with List -II.
| List -I | List -II |
|---|---|
| (A) Metabolic Disorder | (I) Family tree over generation |
| (B) Pedigree analysis | (II) Blood disease |
| (C) Thalassemia | (III) Phenylketonuria |
| (D) Trisomy of 21st chromosome | (IV) Down's Syndrome |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
(A) Metabolic Disorder — this matches (III) Phenylketonuria. The person lacks the enzyme that converts phenylalanine into tyrosine, so phenylalanine builds up.
(B) Pedigree analysis — this matches (I) Family tree over generation. A trait is traced through several generations of a family to find how it is inherited.
(C) Thalassemia — this matches (II) Blood disease. It is an autosomal recessive blood disease in which too little globin is made, causing anaemia.
(D) Trisomy of 21st chromosome — this matches (IV) Down's Syndrome. An extra copy of chromosome 21 causes Down's syndrome.