Gene flow: major points
1) High mij homogenizes allele frequencies in two populations
2) Rate of gene flow influences Ne of recipient population and metapopulation
3) A small amount of gene flow may counteract genetic drift and conserve genetic diversity in small populations
4) Allele frequency in the donor population is assumed to be unchanged after gene flow to recipient population
5) Size of donor population does not influence allele frequencies in recipient populations
6) Applications: calculate number of individuals needed to introduce into recipient population of known size to maintain its genetic diversity.