Hardy-Weinberg principle — NEET Biology Questions

Practice 36 questions on Hardy-Weinberg principle from Evolution (NCERT Class 12, Chapter 6). Free samples below — get all 36 in the app.

36 Questions Evolution Class 12

Sample Questions — Hardy-Weinberg principle

Try 5 questions below from Hardy-Weinberg principle. Get all 36 in the MedicNEET app.

MCQ
Gene migration affects allele frequency by
  • A. increasing mutations
  • B. reducing selection pressure
  • C. introducing new alleles
  • D. causing mitosis
✅ Correct Answer: C
Migration changes gene frequencies in both original and recipient populations.
MCQ
If (p + q)² ≠ 1 in a population, which conclusion is most valid?
  • A. The population is in Hardy-Weinberg equilibrium
  • B. The population is evolving
  • C. Recombination is absent
  • D. Mating is completely random
✅ Correct Answer: B
Deviation from (p + q)² indicates influence of evolutionary forces.
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MCQ
Q4. If a population shows deviation from the Hardy-Weinberg predictions, what can be inferred?
  • A. Allele frequencies are stable
  • B. The population is undergoing evolution
  • C. No mutation is occurring
  • D. Selection is completely absent
✅ Correct Answer: B
Deviation in allele frequency indicates evolutionary change.
MCQ
Which of the following is a binomial expansion of the Hardy-Weinberg equation?
  • A. p² + q²
  • B. (p + q)²
  • C. pq + 2q
  • D. 2p² + q²
✅ Correct Answer: B
The genotype frequencies p², 2pq, and q² result from (p + q)² = 1.
MCQ
Why was there a need for a mathematical model like Hardy-Weinberg after Darwin and Mendel’s work?
  • A. To explain mutation
  • B. To quantify and detect evolutionary changes
  • C. To describe chromosomal theory
  • D. To measure natural selection
✅ Correct Answer: B
Hardy-Weinberg provided a baseline model showing when and how allele frequencies change, i.e., evolution occurs.

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