NEETZoologyEvolution
What is genetic drift?
Options
- AChange in allele frequency due to gene flow
- BRandom change in allele frequency by chance
- CChange in allele frequency due to natural selection
- DChange in allele frequency due to mutation
Correct answer
B. Random change in allele frequency by chance
Step-by-step solution
Five factors are known to affect Hardy-Weinberg equilibrium. These are gene migration or gene flow, genetic drift, mutation, genetic recombination and natural selection. When migration of a section of population to another place and population occurs, gene frequencies change in the original as well as in the new population. New genes/alleles are added to the new population and these are lost from the old population . There would be a gene flow if this gene migration, happens multiple times. If the same change occur