Its expected amount is inversely proportional to the size of the population, and it will normally continue acting on a trait until each allele is fixed or lost.
Models for this process include the transition matrix and identity by descent. In species that reproduce asexually, it is caused chiefly by differential morbidity, while sexually reproductive populations also experience it due to randomness in the recombination of chromosomes. Its expected amount is inversely proportional to the size of the population, and it will normally continue acting on a trait until each allele is fixed or lost. For ten points, identify this process which causes bottleneck and founder effects, consisting of the change in gene frequencies over generations by chance rather than selection.
Models for this process include the transition matrix and identity by descent.
{Genetic drift} [or {genetic sampling error}; or Sewall {Wright} effect]