Question

Which one is not a hereditary disease?
A. Cystic fibrosis
B. Cretinism
C. Thalassemia
D. Hemophilia

Answer 1

CFTR is the gene that is present on the long arm of 7 chromosomes which codes for chloride channels responsible for the cystic fibrosis disorder that is genetically inherited. The abnormal synthesis of the hemoglobin that results from mutations in the HbB and HbA genes on the 16 chromosomes responsible for thalassemia. And physical and mental growth that is caused due to the untreated genetic deficiency of the thyroid hormones known by the cretinism.

Complete answer:
Cretinism is a kind of congenital disease and obtained due to the deficiency of the thyroid hormones and result to obtained goiter and mental retardation. In the cretinism hypoplasia, family enzyme detects, goitrogens and iodine deficiency during pregnancy are the congenital present in it and also called as a etiology of cretinism.
Etiology of hypothyroidism acquired the TSH or TRH deficiencies, medications, autoimmune thyroiditis, and iodine deficiency. The thyroid hormone consists of the iodine, tyrosine and obtained TSH with the help of ${T_3}$,${T_4}$ and during the circulation form ${T_4}$ binds to the Albumin, globulin and prealbumin. TSH is a type of glycol protein and secreted through the anterior pituitary under the influence of TSRH, and has a trophic effect on the thyroid gland.

Therefore the correct option is (B).

Note: The genes are governing that present on the X chromosome and transmitted to the new daughter cells during the sex linked manner from the father to daughters and mother to son or type of the genetic disorders is called as a hemophilia. Cystic fibrous and thalassemia is also a type of the genetic disorders but the cretinism is not inherited from the parent.