Founder Effect. The Founder Effect is defined as a type of bottleneck, a type of genetic drift describing the loss of the allelic variation that accompanies founding of a new population from a very small number of individuals (a small sample of a much larger source population).
For example, two well drilling companies -- one in Pennsylvania and one that covers New Hampshire, Vermont and central Massachusetts -- state the cost for drilling a well and outfitting it with pump equipment averages between $5,000 and $7,000, at the time of publication.
1 Submersible residential well pumps typically cost $200-$1,200 or more, depending on size (usually 3-6 in diameter and 2'-4' long), capacity (gallons per minute), motor (3/4HP-5HP) and materials (cast iron, stainless steel).