Multiple choice

A change in gene frequency due to small population size is called

  1. natural selection

  2. artificial selection

  3. genetic drift

  4. genetic equillibrium

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Genetic drift describes random fluctuations in the numbers of gene variants in a population. Genetic drift takes place when the occurrence of variant forms of a gene, called alleles, increases and decreases by chance over time. These variations in the presence of alleles are measured as changes in allele frequencies.