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NEETZoologyPrinciples of Inheritance and Variation

What is an example of a disease caused by a point mutation?

Options

  1. ACystic fibrosis
  2. BSickle cell anemia
  3. CDown syndrome
  4. DHemophilia

Correct answer

B. Sickle cell anemia

Step-by-step solution

In addition to the above, mutation also arise due to change in a single base pair of DNA. This is known as point mutation. A classical example of such a mutation is sickle cell anemia . Deletions and insertions of base pairs of DNA, causes frame-shift mutations (see Chapter 5). The mechanism of mutation is beyond the scope of this discussion, at this level. However, there are many chemical and physical factors that induce mutations. These are referred to as mutagens. UV radiations can cause mutations in organisms –

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