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NEETZoologyPrinciples of Inheritance and Variation

What can result from the loss (deletions) or gain (insertion/duplication) of a DNA segment?

Options

  1. AChanges in phenotype only
  2. BAlteration in chromosomes
  3. CNormal gene function
  4. DStable genotype

Correct answer

B. Alteration in chromosomes

Step-by-step solution

Mutation is a phenomenon which results in alteration of DNA sequences and consequently results in changes in the genotype and the phenotype of an organism. In addition to recombination, mutation is another phenomenon that leads to variation in DNA. As you will learn in Chapter 5, one DNA helix runs continuously from one end to the other in each chromatid, in a highly supercoiled form. Therefore loss (deletions) or gain (insertion/duplication) of a segment of DNA, result in alteration in chromosomes . Since genes ar

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