Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Cystic fibrosis :It is a common disorder of 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 ti hyoisecreion of thyroid hormones.

Thalassemia :Due to defective production of α or β chains of haemoglobin, autosomal recessive.

Haemophilia :Sex linked disorder due to defective recessive gene.