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Question

Why is genetic drift a more powerful force in small populations?


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Solution

Genetic drift:

  1. The relative frequency of a specific allele in a population for a particular location is known as allele frequency.
  2. Allele frequency is represented as a percentage or fraction.
  3. Genetic drift is known as the random fluctuations in the number of gene variants in a population.
  4. Genetic drift takes place when there is an occurrence of variant forms of a gene known as alleles which can increase or decrease by chance over time.
  5. The allelic variations are measured as changes in allele frequencies in small populations.
  6. Hence, in a small population it can significantly change the allele frequencies so it is a more powerful force.

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