More info about gene pool: http://www.tulane.edu/~eeob/Courses/Evolution_Lecture_Notes/lecture7.html#GenPool

A text summary of the clickable map above, meant for web-crawlers and other automatic tools:
gene pool contains gene
gene pool changed by gene flow
gene pool changed by birth
gene pool changed by death
gene pool changed by natural selection
gene pool changed by immigration
gene pool changed by emigration
gene pool characteristic of population
gene pool has definition all genes in a population