science
Grade-10
Easy

Question

Which of the following is an example of Inherited variation?

  1. Eye color
  2. Blood type
  3. Dimple
  4. All of the above

hintHint:

Traits with limited range of variations.

The correct answer is: All of the above


    No two individual are same. This is applicable to identical twins as well. This is due to the difference in the genetic make up of the individuals. This phenomenon is called as variation.
    Variation can be due to the influence of genetic material or environment.
    Traits like height, weight, skin color are due to combination of genes and environmental factors. The variation cannot be limited to a specific range in these traits.
    Certain traits like dimples, blood group, eye color have limited range of expression. These traits or phenotype is due to the expression of the particular gene. Environment has no effect on this type of trait. This type of variation is called discontinuous or inherited variation.

    • Traits under discontinuous variation have limited range 
    • Traits under continuous variation have unlimited range 
    • Discontinuous variation is due to the influence of genes alone
    • Continuous variation is due to the combined effects of genes and environment

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