Which of the following is not a hereditary disease?
Correct answer: D. Cretinism
- A. Cystic fibrosis
- B. Thalassaemia
- C. Haemophilia
- D. Cretinism
Explanation
Cretinism is not a hereditary disease; it is a condition related to severe congenital hypothyroidism, often caused by iodine deficiency during pregnancy or early infancy. On the other hand, cystic fibrosis, thalassemia, and hemophilia are hereditary diseases with genetic causes and patterns of inheritance.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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