Gene pool describes the sum of all genetic variations (alleles) within a species. Many variations is considered healthy for a population of a species, whereas little genetic diversity (as in a monoculture or due to inbreeding) is considered harmful.
... median income for a household in the town is $61,808, and the median income for a family is $78,873. Males have a median income of $51,469 versus $41,161 for females. ...