This phenomenon can be observed in the inhabitants of Easter Island, as well as in Martha's Vineyard.
This phenomenon can be observed in the inhabitants of Easter Island, as well as in Martha's Vineyard. It explains why polydactyly is common among Amish people, and its effects are often noted among communities which practice endogamy. First outlined by Ernst Mayer, populations which are formed by it have small gene pools and are more sensitive to genetic drift. For ten points, name this phenomenon which occurs when a small population from a larger group breaks off to form a new colony.
This phenomenon can be observed in the inhabitants of Easter Island, as well as in Martha's Vineyard.
{founder effect}