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NEETZoologyPrinciples of Inheritance and Variation

What type of mutations are caused by deletions and insertions of DNA base pairs?

Options

  1. APoint mutations
  2. BFrame-shift mutations
  3. CChromosomal aberrations
  4. DSilent mutations

Correct answer

B. Frame-shift mutations

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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