Question:
The chance of elimination of genes from a small population is an example of
The chance of elimination of genes from a small population is an example of
Updated On: Jul 28, 2022
- selection pressure
- speciation
- adaptation
- genetic drift
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The Correct Option is D
Solution and Explanation
Genetic drift or Sewall wright effect is statistically significant change in population gene frequencies resulting not from selection, emigration or immigration, but from causes operating randomly with respect to fitness of alleles concerned. Genetic drift is expected to be of significance only in small populations.
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Concepts Used:
Evolution
Evolution is a process that occurs in changes in the genetic content of a population over time. Evolutionary change is generally classified into two: microevolution and macroevolution. The process of changes in allele frequencies in a population over time is a microevolutionary process. Three main mechanisms that cause allele frequency change are natural selection, genetic drift, and gene flow. On the other hand, macroevolution refers to change at or above the level of the species.