"Migration may enhance or blurr the | Class 12 Biology Chapter Evolution, Evolution NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 6 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Evolution. This page offers a step-by-step solution to the specific question from Exercise 0, Question 12:

"Migration may enhance or blurr the effects of selection". Comment.

. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 12:

"Migration may enhance or blurr the effects of selection". Comment.

Answer:

Migration is the movement of organisms among the subpopulations and this includes both immigration and emigration. Migration results in homogenization of allele frequencies among all the population in the absence of selection process. It enhances the gene pool of those alleles which have been selected and blur the effects of selection through the replenishment of alleles that were selected against by the nature.

The selection can amplify the effects of migration. If the selection is stronger than migration, then the differences among the population will be maintained. And, if the migration is stronger than selection then the differences among the population will be reduced. The diversity among the population of intermediate age reduces as the results of migration.

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Evolution.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 12: "Migration may enhance or blurr the effects of selection". Comment.....

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