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P-2 Heredity and Evolution — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10ScienceP-2 Heredity and Evolution2 Marks
Question
Define heredity. Explain the mechanism of hereditary changes.
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Answer

(1) Heredity: Heredity is the process by which the biological characters from parental generation are transmitted to the next generation through genes.

(2) The mechanism of hereditary changes:

  • Mutation: Sudden change in the parental DNA can cause mutations. This results into changes in the hereditary characters.
  • At the time of meiosis, the crossing over takes place. This creates new recombination of the genetic information. Therefore, the haploid gametes produced carry changed hereditary characters.

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