NEET2016ZoologyPrinciples of Inheritance and VariationActual
Pick out the correct statements: (i) Haemophilia is a sex-linked recessive disease. (ii) Down's syndrome is due to aneuploidy. (iii) Phenylketonuria is an autosomal recessive gene disorder. (iv) Sickle cell anaemia is an X-linked recessive gene disorder.
Options
- A(i) and (iv) are correct
- B(ii) and (iv) are correct
- C(i), (iii) and (iv) are correct
- D(i), (ii) and (iii) are correct
Correct answer
D. (i), (ii) and (iii) are correct
Step-by-step solution
Haemophilia is a sex-linked recessive disease in which there is a problem in clotting of blood. Down's syndrome (trisomy 21) is caused due to aneuploidy. Phenylketonuria is an autosomal recessive gene disorder. Sickle cell anaemia is autosomal recessive gene disorder.