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NEET2009ZoologyPrinciples of Inheritance and VariationActual

Point mutation involves

Options

  1. Ainsertion
  2. Bchange in single base pair
  3. Cduplication
  4. Ddeletion

Correct answer

B. change in single base pair

Step-by-step solution

The point mutations involve alterations in the structure of gene by altering the structure of DNA. Point mutations are of two types-(i) base pair substitution and (ii) frameshift substitution. Insertion is the addition of one or more nitrogenous bases to a nucleotide chain. Duplication is the presence of one block of genes more than once in a haploid component. Deletion is the removal of one or more nitrogenous bases from a nucleotide chain.

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