Question
Biology Question on evolution
The chance of elimination of genes from a small population is an example of
A
selection pressure
B
speciation
C
adaptation
D
genetic drift
Answer
genetic drift
Explanation
Solution
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.