DNA polymorphism is the basis of - (A) Genetic mapping (B) Mutation (C) DNA fingerprinting (D) Population diversity

By Ritesh|Updated : November 4th, 2022

Choose the correct option:

  1. (A), (B), (D)
  2. (B), (C), (D)
  3. (A), (B), (C)
  4. (A), (C), (D)

DNA polymorphism is the basis of genetic mapping, DNA fingerprinting, and population diversity. Any factor that modifies the nitrogenous bases in the DNA sequence might lead to DNA polymorphism. If the mutation affects an individual's ability to reproduce or survive, the polymorphism is not observed in the population.

DNA Polymorphism

Polymorphism does not come from mutations; rather, the reverse is true.  However, if the mutation affects only the non-coding region of the DNA, it has no impact on an individual's ability to live or reproduce. As a result, the population exhibits polymorphism of DNA in the non-coding region of the genome. Since they do not affect an organism's ability to reproduce, these polymorphisms are passed down through the generations, resulting in evolution and speciation. So, polymorphism functions as a vast data pool and constitutes the cornerstone of population diversification, DNA fingerprinting, and genetic mapping.

Justification for the incorrect selection: Option B: A mutation is a change in an organism's DNA sequence. Errors in DNA replication while cell division, mutagens exposure, or viral infection can all cause mutations.

Therefore, DNA polymorphism serves as the foundation for population diversity, DNA fingerprinting, and genetic mapping.

Summary:

DNA polymorphism is the basis of - (A) Genetic mapping (B) Mutation (C) DNA fingerprinting (D) Population diversity

DNA polymorphism is the basis of DNA fingerprinting, genetic mapping, and population diversity. Polymorphism means the variations in the genetic level which can be inherited and are available at a high frequency in the population.

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