Question
Biology Question on Principles of Inheritance and Variation
Which of the following is not a hereditary disease?
A
cystic fibrosis
B
thalassaemia
C
haemophilia
D
cretinism.
Answer
cretinism.
Explanation
Solution
Cretinism occurs due to hyposecretion of thyroid hormones. Haemophilia is a sex linked recessive trait. Cystic fibrosis is also a recessive autosomal disorder resulting in mucus clogging in lungs. Thalassemia involves a gene mutation in the polypeptide chains of haemoglobin.