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Principles Of Inheritance And Variation

Question
CBSEENBI12002619
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Point mutation involves

  • insertion

  • change in the single base pair

  • duplication

  • deletion

Solution

B.

change in the single base pair

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 of more nitrogenous bases to a nucleotide chain.
Duplication is the presence of one block of genes more than once in the haploid component.
Deletion is the removal of one or more nitrogenous bases from a nucleotide chain.

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