Question:
Evolutionary dynamics are controlled by a number of driving forces. In fact, combination of forces mentioned below always improve amount of genetic diversity within population. Identify the correct option from the following:
Evolutionary dynamics are controlled by a number of driving forces. In fact, combination of forces mentioned below always improve amount of genetic diversity within population. Identify the correct option from the following:
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Remember that selection and drift are directional or stochastic filters that reduce variation, while mutation and migration are inputs that generate variation.
Updated On: Jul 10, 2026
- Gene migration & Natural selection
- Natural selection & Genetic drift
- Genetic drift & Gene migration
- Gene flow & mutation
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Genetic diversity within a population is governed by four primary evolutionary forces: mutation, gene flow (migration), natural selection, and genetic drift.
Step 2: Detailed Explanation:
- Mutation is the ultimate source of all genetic variation, continuously creating new alleles.
- Gene flow (or gene migration) introduces new alleles or genetic variants into a population from other populations.
- Together, mutation and gene flow always act to increase (improve) genetic diversity within a population.
- In contrast, Natural selection and Genetic drift generally filter out alleles or cause random loss of alleles, reducing the genetic diversity within a population over time.
Step 3: Final Answer:
Therefore, the combination of gene flow and mutation always improves genetic diversity.
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