Gene flow

In contrast to random changes in gene frequencies in small populations, which are the result of gene shift (a random change in gene frequency in small populations), a smooth change in gene frequency occurs in large populations due to gene flow. This occurs mainly between sub-populations through migrating individuals.

• A typical example is the steady decrease in frequency of the D alleles of the of the AB0 blood group system from approximately 0.6 in Western Europe to 0.3 in East Asia.
• Another example is the inflow of "white" genes into the gene pool of African Americans.

Links

Related articles

• Genetic drift
• Evolution
• Selection
• Migration
• Small population

Resources

• ŠTEFÁNEK, Jiří. Medicína, nemoci, studium na 1. LF UK [online]. [cit. 11. 2. 2010]. <https://www.stefajir.cz/>.