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Heredity and Evolution — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceHeredity and Evolution3 Marks
Question
Explain with the help of suitable examples why certain traits cannot be passed on to the next generation? What are such traits called?
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Answer

Certain traits cannot be passed on next generation because:
  1. Acquired traits which occur in the somatic cells bring about some changes in them.
  2. Changes in the somatic cells are not passed on to the offspring belonging to next generation.
  3. Only the changes in the genetic material of the reproductive cells can be inherited.
Example: Muscles developed by strenuous exercise cannot be inherited to offspring as these changes occur in somatic cells. These are called as acquired traits.

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