A) Cystic fibrosis
B) Thalassemia
C) Haemophilia
D) Cretinism
Correct Answer: D
Solution :
[d] Cystic fibrosis: It is a common disorder Caucasian race in which thick and more salty mucus blocks the respiratory tract. The homozygous recessive condition produces the defective protein which regulates chloride transport channel. Cretinism: In this disorder, the physical growth, mental growth and sexual growth in children is retarded. Such a dwarf and sterile child is called a cretin. It is due to hyposecretion of thyroid hormones. Thalassemia: Due to defective production of a or P chains haemoglobin, autosomal recessive. Haemophilia: Sex linked disorder due to defective recessive gene.
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