Question:
Genetic drift is change of
Genetic drift is change of
Updated On: Mar 26, 2024
- gene frequency in same generation
- appearance of recessive genes
- gene frequency from one generation to next
- In random change in gene frequencies
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The Correct Option is C
Solution and Explanation
The random changes in gene frequencies in a population occurring only by chance alone rather than by natural selection are called genetic drift or the Sewall Wright effect. It refers to the elimination of the genes of certain traits when a section of population migrates or dies of natural calamity. It alters the gene frequency of the remaining population. Hence genetic drift is a mechanism of evolution that acts in concert with natural selection and changes species characteristics over time. Although genetic drift occurs in all populations but its effects are more marked in very small' isolated 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.