Read the following statements regarding genetic disorders and identify how many of them are correct. — NEET Chemistry Past Papers Chemistry Question

Question

Read the following statements regarding genetic disorders and identify how many of them are correct. A. Sickle-cell anaemia is controlled by a single pair of alleles, Hb and Hb , and only homozygous individuals for Hb show the diseased phenotype. B. alpha Thalassemia is controlled by a single gene HBB on chromosome 11 of each parent. C. Phenylketonuria is an inborn error of metabolism inherited as an autosomal recessive trait. D. Turner's syndrome is caused due to the presence of an additional copy of the X-chromosome. (A) Four (B) Three (C) Two (D) One