Question

Pick out the correct statements: (i) Haemophilia is a sex-linked recissive 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.

Answer 1

Answer:-

(i) ,(ii) and (iv) are correct

• Haemophilia is a sex-linked recessive disease.
• Down's syndrome is caused due to aneuploidy. It is a result of trisomy of 21st chromosome.
• Phenylketonuria is an autosomal recessive gene disorder.